Mania and drinking go hand in hand I have noticed in my life. I used to drink a lot before I was diagnosed bipolar. I have a handle on it now though. Its no where as bad as it used to be.

Being bipolar can definitely be a reason why you drink so much, and maybe you don't think you have a problem. Denial is one major part of alcoholism. I know I denied it for years, I still do even though I still have a couple of glasses of wine every two weeks.

Do what you feel is best, and if you really feel like going over the edge you should talk to someone about it. Do you have a therapist?