<human>: So basically there has been this girl that I like on my college's campus. I first met her after a party with her (we'll call her girl1) and her good friend (we'll call her girl2), and they came back to my apartment. I made out with girl1 and she slept over and we watched a movie the next day together. She is cute and genuinely funny, so I'd like to keep seeing her and hopefully continue things. Since then I've hung out a couple times with her, and have still kissed her then too, but whenever I try to make plans she doesn't seem that into it. She is also really hard to hang out with it seems like, but she has very valid excuses every time she says she can't make something and seems fine around me if I see her around campus and say hi. I don't really know where I stand with girl1 because she doesn't seem to reciprocate many of my advances, or when I try to make plans with her but will cuddle when we watch movies and stuff so it leaves me a bit confused. But what makes this all complicated is that this weekend I had sex with girl2...

Should I tell her about what happened just to clear the air? I already have an agreement with girl2 that we should not tell girl1. I'm afraid somehow she'll find out anyway through the grapevine, but I don't know if she will even care since I don't know if she really likes me anyway.

Can you give me a shortened version of the text?
<bot>: Had sex with a girl I might be talking to's good friend. We both don't plan on telling her, but should I?