It doesn't matter if you're going to be 19. In fact, at least in the United States, you're considered "legal" in most states at 17. You're, first of all, putting this woman's career and lifestyle in danger. Is she married? Does she have a boyfriend? What would her family think? You seem to have little concern for her wellbeing and little knowledge of her personal situation.

Secondly, this woman is treating you and encouraging you in an entirely normal manner for a student-teacher relationship. You are just going to face rejection and embarrassment in the face of this woman if you pursue any sort of relationship with her. Part of being a good date is having the skills and empathy to recognize where you're wanted and to what degree. She has not made any sexual advances to you-- she clearly is unaware of your feelings and not seeking a relationship with you.

>>13
Right on. In >>11 I thought I put it as clearly as I possibly could but if that's not getting through to him, I don't know what will.

It's a strange dichotomy-- OP says he cares for her and would never hurt her, but his proposed behavior puts her job, her reputation, her livelihood at risk.

Considering the way OP asks our advice and then summarily tries to refute every bit of it, I highly doubt he's going to listen, however bad of an idea we deem it, in pursuit of boyish lust.

Sad thing.