<human>: Can you condense the text into a few key points?

I've been hardcore crushing on a guy I met at the beginning of the school year.  We're both seniors, but he's on exchange from scandinavia. (Which pulls in a whole slew of cultural differences to navigate apart from the navigation of the male mind.)  We've worked together and studied together.  I asked him to dinner last week, but he was busy that evening and suggested we eat immediately.  I said I couldn't, and he replied that it was his loss.  

There's lots of good kino going on, but unfortunately only in a public setting.  ex.  weird lingering high-five

THEN, I asked him to the couples party, which is held by my sorority.  He said that he had already been asked to something on that day, and I joked that it might be what I had just asked him to.  We figured out it was the same thing.  He didn't exactly know the girls full name.  (I knew her and was surprised.  I'm not a big fan of her.)  We had a nice hug.  He said I needed to ask faster and I told him we have another one and he actually asked when it was.

We've talked and messaged after that, all flirty like.  He had also offered to connect me with someone, and so I messaged him about that later and he suggested some people I'm not interested in.  (cause I'm crushing on someone else... dur)  

MY QUESTIONS FOR YOU ALL:  Do I bring a date-date or a friend-date?  Can I invite him to pregame (or potentially post-game...)?  Should I talk to the other girl?  How the hell to I act at this thing?  Am I thinking too much about it?
<bot>: I asked a friend whom I had been flirting with to a couples party, but he had already been asked by someone else in my sorority.  He SEEMS more interested in me... What do I do?