He has a victim mentality. He thinks every wrong he has done (crashing the car, drugs, failing grades) are due to his “bad luck” and poor self-esteem. At first he did it recreationally, but now he uses it as a form of escape and “numbing” everything (his words). He was depressed but the drugs have made it worse, I wish he could see that. He’s always been babied his whole life and now faced with adult issues he can’t handle it, thus the drug use hoping everything will fade away or solve itself.