My son is in his second semester of college. He spent the first semester abroad. Today I found out that he is using drugs. He has befriended a very wealthy young man that we found out has had a drug problem in the past. He has been arrested and is on probation. I was reading his sent messages (email) and he described in detail the laundry list of drugs that he had been using. (Marijuana, ecstasy, heroin and snorting ridilin, to name a few). He wrote this email to a girl that he likes and basically says that he is stopping the drugs because he has decided to get his "****" together. He even said that he has asked his friend to drug test him. He did say that he continues to drink alcohol. We have 3 weeks before he returns home to us. I don't know what to do during these three weeks. I know that if I confront him via telephone, he will shut down and I feel that I may lose him. (Meaning he will not come home and figure out how to live on his own). He has shut me out pretty much completely this whole semester. I know now why this has happened and I suspected something was wrong, but everyone kept telling me it was normal behavior for kids being away for the first time on their own. I am scare to death. Please help me figure out where to begin.