Moved all my passwords, which I used to store on Microsoft Edge, to Bitwarden recently

It's alright and, most importantly, free

Was at work doing my usual thing, look down and see female coworker I talk to whenever we work together frowning at me for no reason. Say "uhhh....what..?" she chuckles and says "I didn't say anything". This girl often times stares at me whenever I'm not looking too, like the other day when we were working together I was near the sink and staring at my reflection on the paper towel dispenser, just cleaning myself up, and I see from the corner of my eye her constantly turning and looking at me, so naturally I go over to talk to her. Sometimes she'll approach me with a big smile on her face and get close to me. The other day she texted me after work asking me if I put something away, I said no, blah blah blah, eventually I sent her a link to some songs because she writes her own music so we talk about music a lot, we talked for a bit, shared links here and there, a couple minutes pass, I send her a link and she hasn't replied since. Does her being a Jehovah's witness have anything to do with her behavior? I mean, it's obvious she fancies me to some degree, but why does she give me the hot/cold treatment?