I dont know what to do. Ive liked a boy since 7th grade,and I'm

I dont know what to do.
Ive liked a boy since 7th grade,and I'm going into 9th grade. 
Hes one of my favorite people at the school.
Every morning I would get to see that cute smile of his,and that amazing smile and adorable eyes.
I had 2 classes with him
Science and math.
Math being my favorite class because thats when me and him talk most.
He likes to say loudly in the class "Emily text me back!" and the teacher doesnt do anything.
So I check my texts,and it says "Will you go out with me? I like you alot."
And what do I do? 
I look at him from across the room and say "NO!"
And my friend Jada knows that I like him and she starts freaking out and she thinks hes serious,and I know he isnt. So that happens during the whole class,and while im doing homework in class him and his friend come up behind me and omar goes "Please go out with me." and i still say "no." finally the class ends and i get out of the class as fast as i can. The day slowly goes by and at the end of school I go on my phone and start a text to him saying "why were you asking me out in class?" 
And he quickly responds saying "I was kidding. I wouldnt like a girl like you." 

Yet after all of that,i still like him.