I figure I'll contribute a bit to this thread where I can.
As a teenager I experienced fantasies of suicide regularly on the bus to and from school when I was away from family and not engaged in schoolwork. The pain I felt came from being exposed to nudity and sexuality at the age of 8, and then addicted to pornography a short while later. Many issues at home coalesced and feelings of same gender attraction manifested in what I was looking at. An abusive home life made everything much more challenging.
I remember being 14 and feeling so alone, so vile and worthless, and in the midst of these fantasies about it being better for others if I were gone, how I wouldn't be missed, I met the Lord in these darkest moments of my life. I remember clinging for dear life to Gospel hymns on CD, this was probably around 2003, because nothing else helped. It was when I was listening to I Know That My Redeemer Lives that I first felt His presence. I somehow knew at that moment that the words of the hymn were literally true.
He really does live to wipe away my tears. He lives to impart *all* blessings. He lives to bring me safely back into His presence. Life was still incredibly difficult with a homophobic and abusive father, but I now knew that I wasn't alone in enduring such things. My personal Savior was preparing the way before me, the way of His deliverance, so that I could not only survive, but thrive.
Part of my challenge was not being taught about how the Atonement of Jesus Christ really works. I didn't understand that He didn't see me the way I saw myself and my problems and fears. He didn't see me as a drain on His love or divine resources. He simply needed me to realize that nothing I could do would change how He felt about me, or deter Him from trying to rescue me as often as possible.
I now know the Lord personally, and I can witness with confidence that He is and will always be faithful to us even when it doesn't always seem that way in the moment. He really does feel after us. He reaches out and invites us to bind ourselves to Him through holy covenants, and by virtue of those covenants I am closer to Him than ever. Hope and happiness are possible through Him, by Him, and of Him.