Searching, I'm afraid I'd have to back up what Dee and December said. This is not the sort of thing somebody else can tell you, although if it's interfering with your relationships, that's of course something to consider. And Laurie's suggestion of not drinking for 30 days is a quick (ish) and easy way to figure it out, I suppose.
But, Laura, be very, very careful. I was doing alright--drinking too much but still getting promoted, getting into college, taking care of finances and so on--and then one day I wasn't. To this day I can not say when that point was. At the time, every day seemed the same as the last, more or less. I'm not saying that is going to happen to you (I hope it doesn't, I would wish this on no one) but please, be aware of this.