I used to be the same way - drinking because of emotions. I suggest taking out your emotions in a better, safer way. Punching a punching bag when your angry, sad, is a good example.
Getting over alcohol is hard, and you'll need support. It seems you have some already with your new boyfriend. Talk to him, tell him you want to quit, but it's hard for you because you don't feel the need to. (If you didn't want to, you wouldn't have cared to post this.) Maybe he can possibly encourage you, or if it's the case, possibly help you get professionals to help you as well. I wish you good luck,
PM me if you need.