I [24M] feeling confused and so much hurt on first tinder date w a [21F]

Long story short, I[24M] matched w a girl[21F] on tinder, talked for a couple of weeks and we decided to go out, we went to a bar talked for a little then went for a walk and ate something, after that we decided to go to a club to dance there. I really liked the girl and was interested in her as a person and I think we had chemistry between us, she took the first step to get physical because I was a lil shy, we kissed and cuddled in the club and we went to the toilet together because she wanna pee, so she told me to come w her, and I was too shy to look so she was pissed off and she told me she felt offended because I wasn’t looking, so I said sorry and I ate her out. After some time she asked me if we can go to my place after the party and let’s continue dancing. I told her sure but my body count is low and I’m not that experienced in sex and she was like “that’s a bad thing to say right now”

A guy saw us talking and looking at each other and told us u have very strong chemistry between u too and I can see it.

Then we sat down to talk, both of us were drunk so I started talking about my childhood (sad stuff w my mom) so she told me we should continue the dancing, I went for a smoke and told her I’ll be back, just to see her making out with another guy on the dance floor. I was shocked and hurt so I left immediately.

I’m really confused and hurt, Idk what did I did wrong and I don’t know why somebody will put a person in this situation! I blocked her and now still thinking about the situation.

TL;DR: I was on date w a girl in the club, just to find her making out with another guy.