I'm in love with my teacher, what do i do?

Hi... well first of all: sorry for the long text and sorry if I make any mistakes (English is not my mother language). I'm a girl and I'm in the last year of school. I've had crushes on teachers before, but this one is different, my feelings are getting too strong. Since the first day of class I thought he was cute and adorable, but as the days passed my feelings for him have grown and I can't stop thinking about him, I wait all week just to see him, when he's near me I get nervous, when he looks at me I shake and look the other way... I'm too shy and don't talk a lot. I've had fantasies about him, and I've dreamt about him a lot. My feelings for him are very strong. But the problem is: he's married, he has kids and is old for me. I don't want to take a movement or something. I just want to stop these feelings, because it's hurting me, and I think it's really disrespectful. I think he already noticed my attraction and it's embarassing. I keep thinking he's the perfect type of man for me. I hope I'll meet a guy just like him someday and marry him... He's just so adorable, handsome, intelligent and funny, I love him, I just wish I was his age so I could date him. I don't know what to do, this is really bad for me HELP ME how do I forget him?