How do I deal with having a mental illness(OCD, Bipolar)?

There's your solution. Fix yourself up. Go to a doctor, get some meds or do anything to get better. Your solution is a girlfriend. But you won't get a girlfriend in the state you are in now. Dont drink all day and expect a girl to appear at your doorstep. You seem lonely and you can fix that by fixing yourself and going out there to find yourself a girl