If a murderer can be forgiven, then how can a person who takes their own life not be? But I know full well it isn't Gods will and it isn't our right to take our life.
To be in such a mindset is awful, and god understands what drives people to do what they do, but I can't see how we win by deliberately ending a life that God can work for good, our good and the good of others, to Rob others of our comfort and to deny them our time and our service, and any chance we have of helping or loving or showing them the gospel, while we given this life by God, really is a bad idea.
Those who suffer the most often are used the most, for the God who comforts us in our sufferings is well able to use our experiences to change the lives of others we can relate to, who need us the most.
If you or anyone you know are in this mindset, please tell them, or remind yourself, every storm has an eye, and for us that eye is Jesus, we can hide ourselves in Him until it passes, and every fall we take, however long it feels, we will only land in the gentle arms of our saviour if we cry out to Him for help.
If a believer looks at themselves and doesn't see the need to die to self, they have not seen themselves in the light of truth, but if a believer looks at themselves through the heart of God, they cannot fail to be encouraged and uplifted, for his love is so beautiful it covers every ounce of our ugly failed humanity, and it rejoices over us with singing too. He sees only beauty and He sees only good, for He sees us through the blood of Christ and He sees the perfect and whole image of Christ formed in us, for He sees the beginning from the end. And He sees that it is good.