he starts being mean to u in the lunchroom, like flinging food at you and stuff

i already told u on da last one

When he teases you, but yet always wants to sit next to you and buy you cookies. :3

just simply ask

omg a boy did all those things to me

Alright, look. Before I help out, let me explain this: Among my classmates, I am known as the love guru. If a guy is being a jerk to you and likes you, he's probably in elementary school. No guy in his right mind would intentionally do that to a girl he likes. You may see him glancing at you, if you don't know him well. If you know him, he will act like a playful friend, and tease you. Sort of like gay friends do, I guess. He may buy you snacks and help you out with things, yes. He may visit you during lunch or locker time. But if ypu don't know eachother well, just try to keep on the lookout for him looking at you frequently. You're welcome.

orange is partialy right, asking might be the fastest solution, but if the answer isn't the one you want, you'll end up in a very complicated situation, one you REALLY don't want to be in...

Okay girls let me clear this up you can't tell if a boy likes you ny those things let me put that out of the way second if a boy likes you he wouldn't show it okay now all those playful stuff are just to keep it at the friend level now do you get it a boys actions does not show if he likes you actually you may never know if a boy likes you and if you ask him if he does he'll laugh say no walk away and spread it through the whole entire school that should sum it up .-. see a boy can tell you advice cause they know what its like being a guy :/