Girl's Behavior

Every time me and this girl see each other we smile at each other, is there something there?

Everyday at school and/or work, when we see each other we just look at each other and smile. Don't get me wrong she is a cutie and we're when we do that I just get this feeling like there's something more there going on between us. I have no clue how she might feel or what she might be thinking because she does have a boyfriend, but she even said today that she told her boyfriend about me because I stuck up for her when one of her "friends" was talking behind her back. All day today she was just like thanking me for helping her, and she got sick while we we're working and she was like thank God that I was there to be with her to make sure she was ok. Also this is something small, but like everytime I post on social media she's like the first one to like or comment on my post. Granted we don't have each other's numbers, but something told me to send her a fb message just asking for it, I just don't want to rub her the wrong way, even tho she probably would give it to me because she's always saying how much she "loves" me and I'm so awesome and funny. What do you guys think, is there something there? Maybe?
there's something there
I can't really tell
Other (specify please)
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Every time me and this girl see each other we smile at each other, is there something there?
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