I have a friend who seems as though she doesn't want me around girls aside from her, at least that's how it seems. I was at a club and a couple of friends came by to talk but when that happened, she interrupted the conversation quickly when it became slightly flirty. Most of the time, if I'm with another girl she usually seems a little quieter than usual or slightly irritated.
I'm told she has a boyfriend so I'm pretty sure she's not interested in me, but I just wanted to know if girls can be possessive of guys even though she's not in a relationship or interested in them, or if it's just that she's a protective person toward me in particular (she doesn't do the same with any of the other guys)