I have been dating my bf for the past 4 months. We met when I was vacationing in my home country. He is the most  sweetest and loving person I have ever met. Over the months I had been observing what are his triggers. It is mostly the deaths etc. Most of the time I am able to calm him down and stabilize him. 

Recently his neighbor hung himself and the neighbor's mom found him, screaming. My bf had to help the dad bring down the body. It has been very traumatizing for him and he has been depressed ever since. He says he can't forget the mother's screaming nor the look of the corpse. He can't sleep at night. He has attempted suicide two years ago thrice..but failed.

Today, in the morning he got into a fight with me saying he was sick of the distance (we are in a ldr) and he hates the fact that he can't hold me or talk to me in person. It escalated to the point he started saying everything he could to crush me. It was almost like he had did a 180 personality flip and said I wasn't worth it and that I didn't keep him satisfied...I was taking too long to return back to him (9 more months..I have definite plans of moving to his city). That we were better off separate ways.

He started saying he wanted to kill himself and sleep forever, sitting on the rooftop of a 54 storey building. I started panicking and crying. He said he wanted me to hate him enough that I leave him so I won't be hurt.

After a crying and screaming match, he asked to be left alone.

I am really scared for him. I feel helpless and I don't what to do. I don't want to lose him.