Girl acting distant after hookup?

I'm gonna need to provide some back story here so bear with me. One of my good friends set me up with her friend for a sorority date function. I ended up meeting the girl the night before the function, we hooked up and I spent the night at her house. Naturally I thought the next night would also go well but she acted somewhat distant.

She wasn't exactly outright ignoring me but she seemed way less interested than the night before. I am really confused as to how her interest could change that much in less than 24 hours. We went to a party later that night and she started talking to a bunch of other guys (one who she had hooked up with in the past.) That kind of annoyed me so I eventually left.

I texted her the day after and we exchanged a few back and forth but that was it. I actually like this girl but I don't want to waste my time and have her ditch me for some other guy. I'm thinking I should talk to my friend and see what's up. Any advice is appreciated.
Girl acting distant after hookup?
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