Unfair Boyfriend

I love my boyfriend. I really do, but he has an unfair aspect. Before we got together I rejected him, and he told me that because I said no to being his girlfriend he wanted to commit suicide. He thought about it on his way to work. I rejected him a second time.

There was no thought of suicide, but the third time it was serious. By the third time I've grown to like him I was going to ask him to be my boyfriend on Valentine's day and he was asking me for the third time. We both said yes. I was curious and asked him what if I said no again and said the same thing. Commit suicide for real.

A few months ago I was curious again and I asked him what if we were to break up and his answer was suicide. He didn't want to live if we're not together. And I changed the question. What if we break up and we have kids together and the answer was still the same. I was so mad that he would do that to our kids.

I still love him, but if one day I didn't how could I leave him knowing he would kill himself. I don't want to be stuck in that kind of relationship. I wouldn't want to stay just so he still alive.

If the time comes what the hell do I do?