Is it a real love or an infatuation?

You have a crush on your teacher. You weren't the first and chances are you won't be the last. He'll have had experience moving on infatuated students. Who knows what his story is but it's statistically unlikely your professor is actually the right man for you. Have enough confidence in yourself and learn how to be friends with / act appropriately around a mentor.

here's what you do: when he's sitting at his desk, go over to him and sit on his desk facing him, with your legs crossed. then say in a sexy voice "is there anything i can do to get an A in your class professor?" and be sure to wink at him. if he doesnt react to that, then he's gay and you'll lose interest

You're infatuated.

I understand the feeling cos i like older guys not to much older but maybe 10 years becos they just have it together more than guys my age that try to act like they are a big deal but aren't.

What about the .0001% chance that he could be a rapist?! His game is to lure students with his body and voice and hoo haa and what not then BAM! You start hooking up and he's asking you to do stuff youre not comfortable with but you do it because you "love him"...

Or he's normal and you should tell him how you feel (in which he might turn you down and make everything 200% more awkward).

This might hurt to hear, but you may very well be inlove with the idea of him. From your post I can understand that you don't really know the man. He can look and seem perfect but you won't know this until you really get to know the true somebody, especially when you just knew him in a school setting. You never know he can be perfect for you or he can be completely different than what you see in school. But it sounds like infatuation about the idea of the "perfect man."