So, I was hanging out with a couple of friends at one of their houses twice recently and I wore two sprays of ammo (applied to my wrists and then rubbed on my neckline). There were two couches there and I sat next to this girl on one of the couches both times, and both times she sat so close to my side of the couch that our legs were touching (for quite a while) even though the couch was fairly large for the two of us. Whenever I talk she gives me a healthy amount of eye contact, and I do the same for her. I have also made her laugh a couple of times. She has a boyfriend but their relationship just started and it is having some decently sized “control” issues on his part. I’m wondering if she is coming onto me and what should I do if she is, I admit i’m attracted to her.
You should definitively look for the IOI, take a look at the sticky thread in here The Master “Indicators Of Interest” list bro…
Is she playing with her hair while talking to u? Is she into you and listens carefully with a smile on her face while talking to her? does she scratch the top of her hand, inner arm or cheek? Does she cross her legs pointing towards you? Does she touches you playfully when u make certain comments?.. There are a lot of things that you should look for while talking to a girl, and definitively u need to learn how to read her body language, once you see she is into u, u need to learn how to give the next step so u can hook up with her 
Good luck buddy!