Why is she so talkative with other men but cold towards me?

Right now, a girl in my workplace was showing signs of interest in me. We'd have small talk and she'd ask whether I lived near by but she'd seem so distant sometimes (Hot and Cold). I was coming out into the corridor once and attempting to talk to her but she'd just be talking to the other guys there. They'd act so friendly around each other and she'd laugh but when I tried to talk to her she seemed cold and distant and acted like I wasn't there at all. What's going on? I catch her starring at me a lot in the office and then looking away.

Why is she so talkative with other men but cold towards me?
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