So I meant this girl and we were having a good time (at least I was).
Anyways during our conversation I told her I dance salsa and she told me I should dance with her and teach her. I don’t know how long we danced for, but I was getting tried and I told her I was getting a drink as I was walking with her a wrapped my arms around her stomach and processed to walk with her, but I recall she started moving away from me maybe she thought I was getting to close to her. I didn’t think it was a big deal that I touched because while I danced with her I was holding her back the whole time. Anyways I told her she could come with me she didn’t want to she said she was going to go to the washroom. I went to get a drink, but when I returned I didn’t see her. The place we were in isn’t too big so if she was still there I would have seen her. In conclusion I think she got nervous and left it was 1 am so it was kind of late. I don’t actually know 100% if she left me, but I’m very certain that she did I just don’t understand why she wouldn’t tell me she was going to leaving it’s not like I’m going to stop her. Btw during our conversation I learned that she goes to one of the same classes I do so I’ll be able to see her again. What do you make of this?

if you see her confront her and watch her sweat.

You don't make it clear. Did you meet her AT the place where there was salsa dancing or did you meet and take her out?
If she came on her own, she was free to leave on her own and without saying goodbye. Sounds to me that she was put off by you somehow and didn't think enough of you to want to say goodbye.
If you were on a date, then she was rude unless you were being gauche, which doesn't sound like the situation.
So, you'll see her again in your daily routine and talk with her and see if she's cool toward you or not.

I would act as if nothing ever happened(dancing). Play it off as that, and if she was really into you, or had a conscience...she would explain why she left without at least thanking you for the dance lesson. Otherwise, I wouldn't pursue it any further. JMO

Sounds like she got uncomfortable and left. Maybe she was just looking for a dance partner? IDK

Tip 1: Don't ask a dating site for relationship advice, no offense...but there is a reason I've never consulted this site for relationship advice...

Tip 2: I dunno, do whatever just don't kill anyone...

I agree with totage.Sounds like she felt uncomfortable with you,got creeped out,and splitYou shouldn't confront her in your class.Just be nice like nothing ever happened and don't really try to talk to her.

I meet people and dance with them all of the time. That DOES NOT mean I have to go tell them goodbye when I decide to leave!

That's a good way for a guy to get a restraining order put on him too

Plus most colleges and universities have sexual harrasment rules so it may not be a good idea to confront her about what happenedCould be considered a rules violation.

Well, from the first few lines, sounds to me like he met her wherever it was they were dancing. And then he says he is getting a drink and then puts his arm around her to take her with him while saying she can came with him.

It comes off as rather possessive for someone you just met that night and it probably did make her uncomfortable.