Is she flirting with me?

I attend a small private gym group and sometimes the instructor has us pair up for drills, today a paired up with a cute girl I see on occasion in the gym. We usually have small exchanges, dorky/awkward jokes, or small pleasantries, innocent stuff usually but today seemed different.

In between drills we'll do paired exercises with our partner and today was squats. During our paired squats I could feel my partner pushing down on my shoulders and I couldn't help but mention it cause it was making my squats harder but not a big deal, she replied that it was because I was taller. The next set of squats it felt like she was pushing down even harder on my shoulders so naturally I changed the resistance, I started to pushing on her arms to help alleviate my shoulders.

This feels so silly and funny to write but whatever.

At some point during these squats she says "you said nice and deep" and laughed, only... I never said this. I chuckled and just gave her the ole hi five after the squats and drilling followed by a "good job". After class as we were leaving I asked her about a character on her shirt she and she mentioned her ex gave it back to her and I was wondering if that was her way of telling me she's single. Is she flirting with me?

Maybe it's just wishful thinking but it feels nice to be liked.

Is she flirting with me?
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