@Ray34There's no much I can add to what has already been said.  I can relate my own issues with my partner, certainly not as severe as your breakdowns but it may help.  Due to my current situation, I tend to get depressed a lot and I get frustrated.  My partner tried to help and gets frustrated because she doesn't know what to do and I don't know what I need her to do.  So i've found it helps us to just tell her how I'm feeling and that I know she gets frustrated, but that i'm just as frustrated so none of it is directed at her in anyway and that I really appreciate, her support.  I guess what I'm saying is talk to your boyfriend (he seems like a good guy) about the frustrations you both feel so that he doesn't feel you're frustrated with him in any way at all.  I'm sure he's trying his best and you're trying your best so just keep talking about it while you wait to see a therapist.