There's this fitness instructor who I'm on good terms with at my campus gym. She knew me from a while back, but we didn't really start talking till recently. I think she's into me, and I'm so into her. She doesn't openly flirt with me, but I'm guessing that could be cause she's at work most of the time we meet. She did break the touch barrier with me during the one time I bumped into her when she wasn't working, and she really wanted me to attend her weekly classes, which I did twice.

Two problems though. She has a boyfriend. She also cares about school and is really busy cause of work and studying. Also I'm kinda playing it cool for now (which is the smart thing to do right?) but I wanna escalate things. I figure that since she's really busy she'd be spending a large chunk or her free time with her bf and not want to spend too much time with me, but what about asking her to join me for something like volleyball? I could call her tomorrow and ask or wait till her next class (next week) and ask her in person. What should I do?

What amazes me the most about the typical guy on this forum is that he's always convinced a girl is into him, when many times, she isn't. What makes you think she's into you? What are her IOIs? Just because she asks you to join her classes, doesn't mean she wants to suck your dick. Some people are just naturally friendly with everyone.

Anyway, just escalate and do some kino on her. That's the only way you'll really know if she's into you. Try tickling her for fun or something. Try touching her more. And see how she reacts... If she starts growing cold on you over the following days, then you know you just went too far. If she still gives you the same IOIs, then that's your green-light to escalate even more.

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Before she can respect you, you need to respect yourself.