<human>: Can you succinctly summarize the text in 1-3 sentences?

Hi, /r/Relationships! I need your help!! I'm a 22 year old girl, and my boyfriend is 25. We've been going out for a little over a year now. See, a little while ago, my BF asked me out of the blue if I didn't really like him smoking pot. He's a decently heavy user and I'm mega light, probably around five times a year total, so I'm not totally against it. I told him that I didn't really like it, but didn't really care that much in general and that he didn't have to change his behavior. He got really sulky and moody and acted like I'd told him I'd break up with him if he didn't quit cold turkey, but he insisted that he was going to stop because he didn't want to do something I didn't like. He even made a big show out of giving his pipe, stash can, and all his pot to his little brother. I told him that I'd stop drinking, too, since I found it only fair to give up something that really upset him, and we went from there.

Well, on my part, I haven't had any liquor or drugs since then, even at parties. I assumed he was doing the same. Periodically he would even make comments about missing it and how his smoke buddy didn't really understand. This weekend he had to go on a trip out of town and packed a backpack and suitcase, and forgot his phone charger in his car last minute. I told him I'd get it, but couldn't find his keys, so I looked in his backpack. Well, there I found everything he'd given his brother, plus a little extra more. I asked him about why he had it when he'd said he quit and gave everything away, and he said that it was for a friend that he was going on the trip with, and not for him. I feel like I don't have trust in him because I look at that as the oldest excuse in the book. Should I drop it, and just trust that he's not lying, or am I right to have doubts here and really should talk to him more about it?
<bot>: My BF shows up with all his paraphernalia that he gave away and said it's for a friend, but I don't believe him.