You can be there for your bf, but you can't (and shouldn't) sacrifice your own mental health for him. You've been more than supportive and beyond that there isn't much you can do. You cannot control what your bf is going through, only he can, so I think it's important that you let him be and focus on yourself . I know that's much easier said than done, so you'll have to decide what you can handle, but just keep your own needs in the forefront if you can. I'm really sorry, I do understand it is painful.