You asked whether you are psychotic. Not feeling that human interaction is real may be a sign of psychosis. You also mentioned that you engage in “odd behaviors.” Since you did not elaborate on those problems, I don’t have enough information to provide a definitive answer about your being psychotic.
What further complicates your situation is your drug and alcohol use. Your symptoms may be a direct result of your substance abuse. The only way to verify if your symptoms are being affected by your drug use would be to stop using drugs. The main problem is that you feel as though you can’t stop which may mean that you have an addiction.
Your doctor diagnosed you with bipolar disorder. What’s encouraging is that you have been evaluated by a doctor. I would recommend reporting all of your symptoms to your doctor, including the fact that you are using drugs and alcohol. Many people might try to conceal that information from their doctor but your doctor should know. It could help to identify what may be wrong.
At this point in time, you are unhappy and are not functioning well. As you said, using drugs is your way of avoiding dealing with your problems but it is only making them worse. Your symptoms are concerning and should be treated. The correct way to handle this situation is to get help. Speak to your doctor and report your drug use. He or she can refer you to the proper mental health professionals. The longer you wait, the worse your symptoms will likely become. Act now. Please take care.