Is divorce the answer?

I've been married going on 4 years. In the beginning, my husband was controlling and manipulative. For example, I couldn't wear makeup and I couldn't wear any clothes that were flattering. I put up with it for one because we were overseas and there wasn't much I could do, and second, his first wife cheated on him so I just thought it was something I had to put up with for awhile and one day he'd snap out of it. Needless to say we've had a child together and well I'm not happy. I told him a year ago I wasn't happy and I didn't love him anymore. About a month ago I said it again, and he's been trying hard. But my feelings aren't changing. I am depressed and can't stand the thought of being with him. even though he is trying, when we fight all he does is accuse me of cheating on him. I can't picture going the rest of my life unhappy and miserable. I am at college and I'm as happy as can be when i'm there.. I get home and bam.. it changes and I'm depressed. My mother used to empathize with me that we have different goals in life, and how he is controlling.. now that I told him I want a divorce its all about feel sorry for him and I'm a jerk wanting to be happy... is divorce the answer?