Perhaps trapped is the wrong word? Maybe frustrated is a better term. I was in a similar situation last year where I got the blame for everything from the g/f. And I was always the one that was wrong, according to her. After being through it, and knowing what you're going through, I'd suggest sitting him down and cutting through the BS and find out just what the problems are. If he beats around the bush, dump him. If he honestly loves you, he'll open up and work on a solution. If not, then you got your answer and know what you have to do.

Message me if you wanna talk further.