This guy sits behind me in cl...?

i like him and i want to turn around and talk to him...i barely know him now, yet when we were 6 years old we were friends...not best friends, but pretty good ones...i can't think of any excuse to turn around and talk to him in ways that would actually start a conversation as in can i borrow a pen...but i don't wanna just be like so do you play hockey?...or like remember when we used to play bbasketball a recess in second grade?...what should i do?