nando412's reply history at Help.com

Ask yourself, are they really your friends, or do you hang around with them be cause you want to fit in! I can suggest two things 1. make a stand for what you beleive - and from the positive things that you are saying you seem to have your focus and purpose in the right place, so stand for what you believe and 2. you can get new friends

Love yourself, be confident in what you are doing so that the wrong acts of others doesn’t pressure you into being like them. At the same time love your friends to let them know what they are doing is destructive

Be prepared to face the consequences, go up-front with your story to the people involved. Do what is necessary if it means apologizing or paying back some money - get it out in the open. Make wrongs right - with nothing to hold against you there is no possibilty of blackmail.