Why can't i get over this older man?!

Hi there. I have been infatuated with an older man (around early 40's) for a couple months now. I am a nineteen year old female. He tutors at the community college i attend, i saw him a lot last semester because i was being tutored (not by him) but by someone else and i would see him at the bus stop at school. We had casual flirting like locking eyes, blushing, a little smiling, sitting by each other but at separate tables, but we never talked. I think he knew that i liked him and i think he may have liked me too. I kinda wanted him to make the first move and talk to me but that didn't happen. Anyway i haven't seen him since December when the semester ended, i don't see him around campus at all this semester and i was kind of saddened by this. Is it weird that i still have feelings for him even though i haven't seen him in two months? I think about him everyday and the thing is i don't know anything about him, he was just so dreamy. I know your probably thinking what could a man in his forty's have in common with a nineteen year old besides sex, really i am not that type of girl and he doesn't appear to be that type of man. All i want is a relationship, not sex. I am really mature for my age and that's why i want an older man. (He is not married and has no kids, just so you know.) Plus in addition, i heard men in their forty's care less about sex compared to when they were younger and horny. I really miss him and i feel heartbroken by this even though i really shouldn't be because we didn't have a relationship anyway, but maybe it was not meant to be, any ideas/ tips on how i should move on or if i should move on? Thanks :/