I'm 20 years old. I have a boyfriend since 2 years. He used to smoke weed and drink a lot. But after so much fights tears and convincing he left everything. and promised to not do it again. He didn't touch anything for 2 months. But from 2 days he has again started smoking weed. Because of which he ignored me a lot. and whenever he wished to talk he was after me to talk. Rest all the time he was with his friends enjoying weed. I cried so much. Literally I died of crying. At first he got lil irritated he was also like he has done it after very long for just once. and he loves me more than all that. But i'm not able to convince myself. I tried to leave him but I couldn't leave him. Every time we have a fight he comes making fun. As if nothing affects him. He is always so calm. This irritates me the most. He says he will not do it now. But why did he do that I can't get that out of my head. and he's not even a bit affected. What should I do? Please help.