<human>: My boyfriend of almost a year has recently started having phases where he is in a bad mood and gets grumpy for a few days at a time. He keeps apologizing for it and says he just has a lot on his mind, and that he thinks he needs to get his life together. He is an honors student majoring in mechanical engineering at a prestigious university, so I'm not sure how his life could be more together. 

I've noticed that these down phases he's had come after he does shrooms and I'm convinced they're making him think things about himself that aren't true (I don't know much about shrooms or any drugs really). I want to be there for him and help him feel better, but I don't want to come off preachy about how he shouldn't do drugs if he reacts that way to them. 

I guess what I need help with is how to address this situation and how I can be a good friend to him. I'm a very straightforward person and generally not a very comforting person so I feel like I'm going to end up sounding like an inconsiderate asswipe by telling him to just stop doing drugs. It's also not really my place to tell him what to do with his life so there's that, too.

Can you give me the gist of the text in a nutshell?
<bot>: My boyfriend gets in a bad mood after doing shrooms and I don't know how to comfort him and also hint that he should probably stop doing them.