Theres a boy in my class I can't get out of my head. I sit next to him (teachers rules) & all of a sudden, I can't stop thinking about & looking at him, though I don't have a crush on him. We have banter, we hit each other and we have a laugh. Thoughts?

Sounds to me like you do have a crush on him! Not that there's anything wrong with that, but he's obviously on your mind and you enjoy flirting with him, so maybe you should accept there's something more here.

What do you want to do next?
I used to pass cute guys notes in class just to have a bit of a flirt.

Just be careful because guys at that age can be a bit immature, and say and do really insensitive or dumb things.

Have fun, but don't get your heart broken, it sucks.