Should I just ignore her since 10/10 it won’t work anyway?

She stood next to me like right next to me we were waiting to clock into work everyone else is in line besides me and couple other people. So I see her and another girl start to smile and it’s like the other girl knew what was happening I don’t know. You just clock in after the next so another guy says what’s up to me worked with him before so she leans in as we are talking. So he opens convo with her and that was the last time I saw her she knows him I’m guessing he probably likes her I should stay back. So she is just leading me on maybe just wants attention or something probably why the other girl was smiling. I saw her at the end we looked at each other her first of course just had to make sure she is actually looking and not just because I am. I’m kinda a social outcast regardless of why but whenever girls flirt I always know it won’t go anywhere because of that so. Until I move away I guess I’m asking if I should use this as practice talking to girls until then and very little to no chance it will go anywhere should I even try. Should I just ask him if she has a boyfriend already to save my self confidence or speak directly to her I hate when people say it’s just friends because if that’s the case leave me alone.

Should I just ignore her since 10/10 it won’t work anyway?
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