Damaged guy

I really really like this guy. We’ve been pretty much in a situation-ship for almost a year now….but I’m tired. He’s so angry (badly bullied as a kid), he has extreme trust issues etc. I thought I could love him through his pain and anger but I don’t think I can. On top of that even though I have feelings for him and I was hoping we could work towards a relationship, he only sees me as a friends with benefits. Other than that we get along great. We have alot of the same interests, we barely fight; we just mesh well. And thinking of letting him go hurts. But I’m just tired. Have you ever been involved with someone like that? How did it go for you? What should I do?