<human>: I moved into college three weeks ago, and immediately met a girl who I had a great connection with. We have the same major, same sense of humor, and I love being around her. Our chemistry is great, and we've definitely moved past the point of being just friends. However, tonight I got a text from a girl I was close with in high school- she'll be coming to stay with me tomorrow night. But that Isnt the issue. The girl I met here occasionally enjoys smoking pot, which is the quickest turn off a girl could ever do for me. I know its not a huge deal, but it has always been an immediate deal breaker for me. She wants to use this time when I'll be with the other girl to go out and get high, and I know its out of bounds for me to ask her not to. My question is, how can I approach a conversation with her that lets her know I'm not comfortable with it, but also doesn't make me seem pushy? I don't want to give her an ultimatum, I just want to start a conversation that benefits us both.

Can you provide a brief overview of the text?
<bot>: my new girl wants to spend a night smoking, how do I tell her that that's a potential tripping point for me?