Maybe avoid doing cocaine and smoking pot, in general. Not a good thing to do. Seems like you need to find a new group to hang out with -- who are drug-free. I recommend going to NA meetings. You'll meet others in recovery who can connect you with a sponsor and introduce you to a community of people who are in recovery, who are sober, who are rebuilding their lives. My cousin is in NA for drug addiction, going on ten years now. She's got a really high paid job and friends all over the globe. You really can't change anyone but yourself. You can choose to stop hanging out with people who do drugs. Start small like that.