Why hang out alone with a guy if you aren't interested but you know he is? am I being used?

2oblivious
OK so I met this girl while hanging out with a group of my friends (she was a friend of a friends) and we instantly became friends. We got along very well and we have same interest and stuff. So time goes by and we start hanging out just the two of us. Weird thing is I get mixed signals from her while we hang out. I mean SHE asks me to do chill but when we do she doesn't make the effort to like flirt or act interested. What's the point right? I've asked a couple of our mutual friends and they think that its weird that we hang out alone but nothings going on between us and they also tell me that they think she likes me but I'm not seeing it (they don't know for a fact though). so I guess I'm asking why hang out alone with a guy if you aren't interested but you know he is? am I being used? am I a time filler?
Why hang out alone with a guy if you aren't interested but you know he is? am I being used?
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