Bipolar disorder and addiction often go hand in hand. The theory is that bipolar sufferers sometimes self-medicate with drugs or alcohol. Using drugs and alcohol when you're manic doesn't mean that it's causing the mania. When manic, people notoriously use bad judgement so it's not surprising that you would be drunk when manic (or depressed). I always do things I regret when manic.

If you're not already working with a psychiatrist and/or therapist, I highly recommend it. Community mental health organizations can be very helpful for locating a doctor that fits your needs and budget. Even if you don't have insurance, there are programs that can help you. Medication and/or therapy can really help get your moods and behaviors regulated and easier to control. It also helps to have a professional on your side who understands what's going on and how you feel. If you can get your moods regulated, you might find that you don't need to rely on some of your more destructive behaviors.

One thing is for sure, if you don't get help, things probably won't get any better. Welcome and good luck.