How do u know if the guy u like likes you back?

hey wats up my name is noel i like this guy named brock and everday in homeroom he will sqy ual stuff to me and i like when he does that and i flirt with him back and he always stares at me and tries to make me laugh all the time and he always tries to get me to touch him like he will tell me he wans to see how big his hand is from mine and then he will grab my hand and put it up to his so can please tell me if u think he likes me - noel marie :)