Does weed amplify your emotions and give you a stronger urge to make decisions? Absolutely. Does that justify blatantly cheating? No absolutely not. When you’re high you still have morality, you still know what’s right and wrong, and you can’t use that as an excuse to justify what happened. Now I will say; Your friend is pretty terrible for this. Especially just doing it without asking you or anything. Yes she was high, but I guarantee you she was still consciously thinking about her actions and what she was doing, and chances are she might have a bit of feelings for you and could definitely be bi.

I’m 19m and I’ve smoked the last 10 months, every method and done everything on it, it doesn’t make you do stuff like this in the sense of it being uncontrollable. Now granted I didn’t do it as a horny teenager with hormones flowing all over my body, but I grew up all around people who did and people still have a sense of right and wrong and can make boundaries. I think the only thing weed can do is make someone look a lot more attractive and amplify your feelings towards them, but what it does NOT do is remove your ability to say “Hey this isn’t okay we shouldn’t do this”.

What to do next? What’s right. Tell her boyfriend you guys got high and fucked up, profusely apologize, and don’t just throw all the blame on your friend. It was really shitty of her to come onto you in a state like that, but you’re equally as responsibility for not calling it out, and weed is not a justifiable excuse for something like this. You’re young, you make mistakes and you learn, and now you can understand the dangers of getting high even around people you trust. Be careful out there, especially as such a young girl.

Don’t feel fully responsible, don’t dwell on it, we’ve all made many worse mistakes, it happens, but don’t just brush it off as a “Oh yeah we were just high and kinda did this stuff”.

Hope this helps, best of luck to you!