I love him, and i know he knows.

During my junior year of high school, a new student teacher came for our science department. Every girl I know was obsessed with him. He was young, (about 23)and according to them, he was "SO CUTE". I never thought so however. I had been talking to a friend walking down the street at school and she brought him up saying that he was "OK"... I yelled "Oh my god, not you too?? (his name) isn't even THAT cute!" and of course I turn around and he's walking directly behind us. Pretty embarassed, I avoided him the rest of my Junior year. Well, my senior year is coming to a close, and him and I have grown very close. The first time I actually met him was after I had performed at our showcase, and then after that our relationship grew. I never had one of his classes, but I would always go and see him in his room after school where we would talk and joke just him and I. Also, anytime that I am upset, I go to him and he comforts me, not in the way most "teachers" would. Lots of hugging, and holding me in his arms.. I like it. It doesn't make me feel creeped out or anything because I care for him, more than anything. I'm 18, about to graduate, and he just broke it off with his girlfriend... I think that's suspicious, but I'm not reading into things. Whatever happens, happens. There was a time where My grandmother and I were heading to a store, and he had been there and when we caught each others eye, I ran over to him and gave him the biggest hug. All he could tell my grandmother is how amazing I am, and how Incredible my artwork is ect... My own grandmother wants him to love me! hahahha. I think he knows that I care about him more than I should, but.. he isn't doing anything to cease that. It seems to me, if I add up everything that has happened this year, he too cares for me more than he should. I don't know what to do. I'm afraid that when I graduate, everything we feel for each other will be left unsaid. Is this normal?