She stares at me but doesn't talk to me?

Over the past few months i have noticed that a coworker has been staring at me but we have not spoken to each other since she was rude to me awhile back. This has been going on for awhile now and one time on Super Bowl Sunday me and her were in the break room and she looked at me and raised her eyebrows at me and then she looked away.

Fast forward to last week she smiled at me and looked away and then looked at me again and smiled as she was going home. I have caught her looking at me as i'm walking to my Car or while im sitting in my car. When she is around me she's quiet but whenever she's around anyone else she's outgoing and friendly.

I've thought about going to talk to her but after that one night when she was rude to me i'm not sure if that's a good idea or not. I mean i'm just trying to do my job and go home but a friend of mine says i should go talk to her

So with that being said...

1) What the Hell is going on?
2) Should i go talk to her?


She stares at me but doesn't talk to me?
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