I'm obsessed with my teacher

There's a science teacher at my school who started at the beginning of this academic year, and ever since I met him I've been completely obsessed with him. We have two chemistry lessons a week in his classroom, and I always arrive early and leave as late as possible so as to spend more time with him. Sometimes, he sits and watches our lessons, so I make sure I revise what we're going to do before the lesson, so that he thinks I'm espeically bright. If I see him around school, I'll ditch my friends to go and walk near him, or I'll go over and ask him a chemistry question. My form group is across the corridor from his, so I always pretend to my tutor that I need to borrow a chair or ask someone in his form something, and go into his room.

To start with I thought I was being quite discreet about my feelings towards this teacher (who is in his mid-twenties, I think, whereas I am almost sixteen), but now my feelings are getting stronger, and my friends have all clicked on. The trouble is, every now and again one of them tells somebody else, and I'm scared that eventually this teacher will find out. My friend's boyfriend is taught by him, and the other day he started asking him personal questions, like whether he is married- it turns out he is engaged.

I am a real teacher's pet in school, and if it leaked out that I fancied him it would destroy my reputation and I would not be able to return to school.

I have memorised his timetable and his places on the breaktime and detentions rota, and I stand outside the hall and watch him when he is on detention duty.

He doesn't teach me, but I'm fairly sure that he knows who I am by now.

Please help me- any advice, questions, comments, anything- because I don't know what to do about it.

I have memorised his timetable and his places on the breaktime and detentions rota, and I stand outside the hall and watch him when he is on detention duty.