Had sex with a girl in my dorm off of tinder, the night ends extremely bizarrely and she becomes upset when I say I don't want a relationship. She knew we were going to hookup though, so why won't she talk to me anymore?

I matched with a girl on tinder, and she was pretty receptive. Once we figured out that we were actually staying in the same dorm she became super attracted and messaged me extremely often. Asked me for my number, and texted me again that next morning at 8:00am to talk some more. Eventually I told her we should go out to eat, but she instead suggested that she just come over and we can "watch a movie". Sure. She comes over, she tells me how she was telling her friend how odd it was that we matched on tinder and all that, we watch the movie for about 3 seconds, then I kiss her and she pulls me in to have sex with her. She clearly wanted to have sex with me from the start, and was planning on it.

After, we start talking and we get on the topic of male/female biological imperatives. She says how the females compete for the top male, and how men are programmed to have sex with as many women as possible etc etc. I get excited and explain to her that's why I can't ever get into a relationship, because I just want to have sex with other girls. She gets sad and starts to ask if I think true love could ever change that, I said I've never been in love but probably not. And she starts to cry a bit. The topic changes and we have sex again, after we finish we sit on my couch and she realizes she lost her keys. We tear my place apart looking for them, but no luck. We go downstairs to the front desk and ask if they can open her room with a master key so she can see if it's in there, but they can't. So she goes and knocks on her door until her room mates open and she looks for it but can't find it. I eventually find it and bring it up to her, she clearly is very unhappy with me and I give her a barley reciprocated hug goodbye. Next morning I apologize through text, she says it's OK. I ask if we can hang out again and she never responds.

I don't understand what happened here, I asked to take her out on a date and she declined to have sex at my place instead, but then got upset when I said I didn't want a relationship? Or was it the fact that she was feeling so shitty about losing her keys she associated me with that feeling and therefore hates me? Anything I can say or do to fix this? I enjoyed talking, hanging out and having sex with her and I really want to see her again.