Wrong Signs

I think this guy likes me but I don't know. HELP ME!!!!!!!

How do you know when someone likes you?  They could just be being nice to you beacause your there friend. What if you catch them staring at you, making you laugh, and  when they're making the whole class laugh they look at you personly. What if that person likes to mess with you like throwing stuff at you, poaking you, and blowing stuff in your face and stuff like that. You could be just getting the wrong signs, but that person may atually like you.