Does my techer like me? or is it cuz he knows i like him?

i cant tell if my teacher likes me or just knows that i like him. ive been crushing on him ever since the begining of the school year. he knows i like him becasue i blush when ever he talks to me and stuff, i kinda make it obvious , but i sware i dont try, so dont think imma slut cuz im not lol. anyway he seems to be really nervous when ever he talks to me and looks me in the eyes. and i can tell in his eyes that he some what likes me or at leat thinks im pretty. i dont want to sound full of myself but i think ts true haha and idk if its cuz of him knowing that i like him or if he likes me, help?