This married woman at my MMA gym (about 40f) is always sort of flirty with me (21m). Her kids also go there. And no she's not just being friendly like a dude would. She's called me hot like once and has made flirty jokes about my muscles here and there. When we roll Jiu Jitsu she always gets on top of me and then shoved her boobs onto my face. She has also blatantly admitting to flirting with me when we're in class. A few times she's rubbed my shoulder. I can't tell if she's flirting as a joke or because she's into me. Sometimes I flirt back because I like it but I don't know anymore. Whenever I flirt back she flirts less. And then after I stop she starts again.

Recently she doesn't do it as much, and is kind of just a normal amount of friendly now. This doesn't seem like a big deal but I'm at that age where I notice every woman under the sun and it's always making my social life difficult. I can't go two minutes without thinking about her or most other women tbh. So this situation is definitely messing with my head.

What's her deal? Does she just like the attention? I don't have the social aptitude to understand what this woman is doing. What do you guys think I should do?