It sounds like perhaps you need to really decide if you really want to break up with him...sounds like you are unsure. Getting drunk hoping to do something stupid so he breaks up with you doesn't seem like a very good way to go about it.

If there are issues in the relationship it might be worth discussing them with your BF...its unclear why you want to break up with him but that is your business so you don't have to elaborate if you don't want to.