Scripture makes it clear we are to remain faithful until death (Rev 2:10). Willfully cutting your life short is outside of faithfulness because 1) you are refusing to fulfill all the will of God for your life, and 2) you are appealing to death for victory over tribulation and suffering. Suicide is the act of "reaching through" death to find life. God does not want us to appeal to death to have victory over suffering and tribulation in this life. Doing so glorifies Death, not Life.
The prophet Elijah appealed to death to escape his pain and suffering, and death is exactly what God denied him. We see that he was brought out of his suffering; but it was through Life, not death through which he escaped (the chariot of fire took him bodily to glory. This event serves as a type demonstrating an important spiritual truth). If God would have given Elijah mortal death, as he was requesting, then Death would have been glorified over the Life of Christ. Many theologians have missed this important theological truth in this passage of the Bible.
But he himself [Elija] went a day’s journey into the wilderness, and came and sat down under a juniper tree: and he requested for himself that he might die; and said, It is enough; now, O LORD , take away my life; for I am not better than my fathers. 1Ki 19:4
And it came to pass, as they still went on, and talked, that, behold, there appeared a chariot of fire, and horses of fire, and parted them both asunder; and Elijah went up by a whirlwind into heaven. 2Ki 2:11
Do not appeal to Death for salvation from torment and suffering. Death is not your savior, Christ is. He has made a way for you to overcome in this life. You must come to understand what "way" this is, and only the Lord can reveal this to you. You must get rooted and knowledgeable in Grace and faith. Earnestly ask the Lord to open up His Word to you--in all of its glory.
For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God? 1Jn 5:4,5
Kill yourself and you will spend and eternity in horror so outside of human comprehension that if you were to spend just a moment in hell, and brought back, you would be in shock; you would be unable to express it in language. If you think the sufferings of this life are bad, they are nothing compared to an eternity in separation from Christ. Not even close.
Hell-Fire.
And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth. Mat 25:30
And if thine eye offend thee, pluck it out: it is better for thee to enter into the kingdom of God with one eye, than having two eyes to be cast into hell fire: Where their worm dieth not, and the fire is not quenched.
Mar 9:47,48
There is an everlasting hell and you will spend an eternity there if you murder yourself.
Our lives are not our own to murder.
What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? 1Co 6:19
Behold, all souls are mine; as the soul of the father, so also the soul of the son is mine: the soul that sinneth, it shall die.
Eze 18:4
Earnestly seek your Maker for knowledge in how to stand in victory in tribulations and sufferings. They can be a cause to push you into his arms or away; Your choice.
These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.
Joh 16:33
Christ in you will overcome--by faith.
