I told a girl that I liked her, but she hasn't replied?

Anonymous
So I've been hanging out several times with this girl who is also one of my ex's best friends. We've gone out several times just me and her to dinner/movies/shopping/drinking. The past few times I've gone to pick her up and we've gotten pretty drunk together. Recently, I told her that I liked her, but she hasn't responded to my msg. She ignored me a few days and later that week I asked if she wanted to meet up for dinner. She said yes, but that a guy friend was visiting her. So we and a couple of mutual friends all go out to eat and have a few drinks. It was a bit awkward at first because it was the first time we saw each other after I told her. But things turned back to normal and we were all having fun together. So my question is why doesn't she say yes or no? and what about that other guy she brought with her. she said he was just a friend. she seemed to treat me with special attention when we were at dinner and he appeared to be a bit pissed.
Updates
+1 y
btw when we do go out we take turns with the check. so I don't think she's using me for $. but the night we went out with our mutual friends and her "visiting friend" she asked for a separate check.
Updates
+1 y
is she leading me on? or does she like me but is having conflict with me being her friend's ex? does she like that other guy? she seemed to have special treatment towards me asking me to eat off her plate and he didn't seem to like that. mybe he likesher?
Updates
+1 y
ex is in another state for school now and I even brought up that subject of dating a friend's ex and she pretty much said it should be fair game.
I told a girl that I liked her, but she hasn't replied?
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