<human>: has happened*

So this is one of those things, you can't really waste your friends' time with. No one really wants to hear about it. 

This weekend I went on a trip where I met this girl, who admittedly I already knew had a bf (he wasn't there). She turned out to literally be a 100% match to what my type is.  Looks AND personality. The only bad thing is, she was way too flirty for someone that is in a relationship. Obviously, I was too, but I'm single.

The question/topic of discussion here is... Why the hell am I constantly thinking about her with a weight on my chest I've only felt with a ltr, when I just met her and I only spent 2 days with her? The chance of me and her right now is pretty much 0% but here I am not being able to stop thinking about her. This can't be normal, it should take much longer time to develop this? Am I just being a chick? How do I shake it?

Condense the text into a few key points
<bot>: Get a crush on girl I just met, biggest crush I've probably ever had and can't shake it. Barely know her.