How do know if someone likes you? I like this boy named Brice and he doesn't like me.does he like me or not I don no but it seems like I'm not there.

Some people could blush at someone's name. I experienced that with a boy... :3

Okay this doesn't apply to all humans, but here are some physical indications that he might not like you.
- When you talk to him, his feet are pointed away from you.
- He looks away from you when you're talking to him. (This is also a sign he may like you.)
- He rolls his eyes or sighs if you pass or try to talk to him.
- He ignores you if you try to call him.
If he likes you, then he'll be doing the opposite of the above.

Here are some signs that he likes you: See More
-He may stare at you constantly
-He will deny that he likes you in front of his friends (In a loud and embarrassed way most likely)
-He will try to start a conversation. (e.g "Uh, how are you today?" "What's your favorite color?"

Remember that there's not really an super accurate way of finding out if he likes you or not, unless if you ask him directly (which I recommend you shouldn't unless if you're mentally prepared.)

Additionally, if he doesn't like you and treats you terribly, then don't bother liking him.