AITAH for being upset that my bf is holding a grudge?

My (25f) bf (23m) of 1.5 years doesn’t like when I smoke weed and made it clear maybe 6 months ago that he doesn’t want me to do it at all anymore. I had a pen, and when we first had the convo 6 months ago I threw the pen out and haven’t owned one since. A month after that around Christmas time, we were at my family’s and my brother offered me a hit of his pen, I hit it and tried to hide it from my bf but he totally saw and was pissed. I apologized for this and we moved on.

Then, a couple days ago on the 4th of July, we were at his family’s place, and his whole family smokes except for him and his dad. His sister offered me a hit of her pen, and I said yes. I was hitting it pretty often (not in front of my bf), and the last time I hit it he happened to catch me. I was also super drunk, so I couldn’t really talk to him about it until the morning after (yesterday). He made it obvious he was upset and wasn’t talking to me all day until the evening. I knew he was upset, so I bought him breakfast, made him coffee, etc. being SUPER nice and apologizing/saying I wouldn’t do it again.

He wasn’t having it at all, and then finally around dinner time he talks to me about it and just makes it clear he’s really angry with me. He says we’re not ever going back to his sister’s place, and he “felt obligated” to break up with me. He hasn’t, and I thought we made up last night… but today has been the same thing. Not speaking to each other, him making it clear he wants nothing to do with me. I’m trying to give him space but I’m also confused bc I thought we had made up, and he wasn’t cuddling me last night. But now he’s back to being pissed.

Is he overreacting? Am I the asshole? I don’t know, but I wish he would communicate with me instead of going nonverbal and being mean. What should I do?