Should i?

I met this guy on the first day of school. It was in my first hour class and I had started to flirt with him when the five minute bell rang. He went to the teacher desk and started taking role. I turns out he's the teacher! Ever since that day, I...

just can't get him out of my mind. Do I go for it?

It is extremely unrealistic that your teacher has an interest in you that way, as a teacher he probably knows his place and only sees you as his student, nothing more. You may have a crush on him, but it's just infatuation and eventually you will find someone more compatible with you. Also, if he EVER gives you any kind of hint or sign at all that he is interested in you, it is against the school's policy and could be counted as harrassment. You don't want to get him into trouble for trying to go anywhere with your crush on him, so try to move on.

NO HUN YOU CANT YOU SWEAR THAT GUY WILL PAY ATTENTION TO YOU COME ON HUN UR GONNA MAKE HI LOOSE HIS JOB I REALLY THINK YOU SHOULD JUST MOVE ON

No way! it is against the law! do not engage in this relationship, he could end up losing his job and career, dont make your life so complicated!