The worst thing about being in hell is that you will forever regret not acknowledging that God is Lord, the creator of all things and that He could have saved you if you had only asked Him. After Jesus comes back to get all the children of God (those who have accepted Christ as their savior) there will be a 7 year tribulation. This will be ‘hell on earth’. After that Satan will be sent to Hell for eternity and those who have not accepted Christ as savior will go with Satan. But before you go, you will see God and you will then know that He is Lord. You will bow your knees before Him and then you will be sent away forever. You will forever know and remember what you will never see again. To know what you could have had if only you would not have been so stubborn to believe the truth. Forever to say “if only”. Forever to regret. Forever to mourn. Forever is a very long time!

In case you don't believe that you will regret will in Hell, here is scripture that shows there is regret in Hell:

Luke 16:19 There was a certain rich man, which was clothed in purple and fine linen, and fared sumptuously every day:
Luke 16:20 And there was a certain beggar named Lazarus, which was laid at his gate, full of sores,
Luke 16:21 And desiring to be fed with the crumbs which fell from the rich man's table: moreover the dogs came and licked his sores.
Luke 16:22 And it came to pass, that the beggar died, and was carried by the angels into Abraham's bosom: the rich man also died, and was buried;
Luke 16:23 And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom.
Luke 16:24 And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.
Luke 16:25 But Abraham said, Son, remember that thou in thy lifetime receivedst thy good things, and likewise Lazarus evil things: but now he is comforted, and thou art tormented.
Luke 16:26 And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence.
Luke 16:27 Then he said, I pray thee therefore, father, that thou wouldest send him to my father's house:
Luke 16:28 For I have five brethren; that he may testify unto them, lest they also come into this place of torment.
Luke 16:29 Abraham saith unto him, They have Moses and the prophets; let them hear them.
Luke 16:30 And he said, Nay, father Abraham: but if one went unto them from the dead, they will repent.
Luke 16:31 And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, though one rose from the dead.

This is God's judgement for those who have not chosen Christ as their savior:

Revelation 20:13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
Revelation 20:14 And death and hell were cast into the lake of fire. This is the second death.
Revelation 20:15 And whosoever was not found written in the book of life was cast into the lake of fire.

Psalms 9:17 The wicked shall be turned into hell, and all the nations that forget God.

Romans 14:11 For it is written, As I live, saith the Lord, every knee shall bow to me, and every tongue shall confess to God. Romans 14:12 So then every one of us shall give account of himself to God.
Philippians 2:10 That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth;

Revelation 20:13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
Revelation 20:14 And death and hell were cast into the lake of fire. This is the second death.
Revelation 20:15 And whosoever was not found written in the book of life was cast into the lake of fire.

God does not want you to spend eternity away from Him. But He has given us all free will to choose what we want. I pray that you will choose an eternity with God. He did not even spare His own creation of Angels that turned against Him. (2 Peter 2:4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;) So why should He treat us any differently?

He has given us His word in the Bible and He gave his Son, Jesus Christ, to save us from our sins. (Acts 26:18 To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.)

Satan will do whatever he can to deceive you to keep you away from God. He will tell you its not true that you can live your live without God. He wants you to have the same fate that he will have. He can even make himself look like he is good (2 Corinthians 11:14 And no marvel; for Satan himself is transformed into an angel of light). The only thing he wants to do is win your soul. He doesn't care about you.
2 Thessalonians 2:9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
2 Thessalonians 2:10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.

The only way to get to Heaven is through Jesus Christ.

Acts 4:12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.

Romans 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
Romans 10:11 For the scripture saith, Whosoever believeth on him shall not be ashamed.
Romans 10:12 For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.
Romans 10:13 For whosoever shall call upon the name of the Lord shall be saved.

1 Thessalonians 5:9 For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ,
1 Thessalonians 5:10 Who died for us, that, whether we wake or sleep, we should live together with him.

You must be born again!

John 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
John 3:4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be bo
rn? John 3:5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
John 3:6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
John 3:7 Marvel not that I said unto thee, Ye must be born again.
John 3:8 The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.
John 3:9 Nicodemus answered and said unto him, How can these things be?
John 3:10 Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?
John 3:11 Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
John 3:12 If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
John 3:13 And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.
John 3:14 And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
John 3:15 That whosoever believeth in him should not perish, but have eternal life.
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
John 3:17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
John 5:28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
John 5:29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.

Heavenly Father, in Jesus' name I ask you forgive me of my sins. I repent of my sins and open my heart to let Jesus come inside of me. Jesus, you are my Lord and Savior. I believe you died for my sins and you were raised from the dead. Fill me with your Holy Spirit. Thank You Father for saving me in Jesus name. Amen

Another website regarding this is here.