<human>: Provide a brief overview of the text.

Some background:

The girl and I have been friends with each other for about 2 months, but last night's banquet/dance was our first date. I think I have a pretty solid evidence for her liking me from last night:

We fed each other dessert

She fixed my shirt for me

We danced close during the slow songs

We danced closer during the fast songs ;)

She sent me a text afterwards thanking me for taking her and how she really enjoyed the dance.

The problem is, she has a different date for prom that she does not know very well; they really haven't had much contact outside of a mutual class and planning for Prom. She probably asked him because no one else had asked her to prom yet (I was pretty late asking her to our band banquet). 

She told me she would come and hang out with me if her prom date wasn't being fun, but I don't want to come off as a date stealer. At the same time, I like her alot, and I'm a little nervous about this new guy. 
Should I dance with her if she is not having fun, and would dirty dancing be ok? How much space should I give them? Would it be okay to take her to an after party without her prom date? If I stumble upon the two dirty dancing, should I just cut my losses?
<bot>: I'm not sure how to handle my band banquet date from last night; She's going to prom tonight with a different date, but she doesn't know him very well.