Well glad to hear you graduated and all that!
But, I doubt she thought of you that way. I have been to some websites about crushes on people in authority over you and let me tell you, that slapped me right back into reality.
They even had instructors that posted about students that had crushes on them and how they handled it. Lets just say, they put a LOT of distance between themselves and the student for a REASON. They also can tell usually right away if a student has a thing for them, and they kinda chuckled about it like it was a funny thing. Point is, they realize this happens with certain students. But, a majority of them KNOW that its wrong to act it out and realize the boundaries. Most won't even pursue a student after the fact that they graduate. Mainly, because it looks bad.
Find someone closer to your age. Or maybe a dominatrix. HEHE. I don't know. I just wouldn't dwell on things happening with her.