Wow i think my teacher likes me?

Recently ive been having a lot of feelings for my pe teacher, you ever liked someone that you get a giddyness inside you when they wink at you, well i have that with my pe teacher and i think its because since hes my teacher its all abit exciting, and i think he feels the same, we started off having ALOT of eye contact and by ALOT i mean like id walk down the pe corridor just to bump into him and we'd just have eye contact alll the way down the corridor and then when id walk past id turn round to look at him and hed be doing the exact same thing, and hes got a cheeky look to his smile which drives me crazy, anyway yeah its not just that.. in PE lessons he will chat all the time to me and ask me about my life, and one time i felt really poorly, and he came over and was like "are you okay ? not having boy problems are we? who do you like then?" and i just went "oh no no no i just feel poorly i dont like anyone, well anyone my age" and walked off i know that was reallllly flirty but i couldnt resist it, and then from then on if i caught his eye he'd wink at me and kinda look me up and down but i didnt feel uncomfortable because theres been many times we've been alone together and hes never made me feel uncomfortable, but we definatley flirt, so much its become obvious to my best friend, and she made a comment after school when there was just us three there like "youd think you two were a married couple" it made it kinda akward but we all laughed and he went "of course not dont be stupid" and i looked at him and he just did his cheeky wink, and then he lives at the bottom of the village where i live, and we walked up from school once together, and he didnt say anything wierd or creepy we were chatting just as friends but then when he reached his street he went "well its been nice, i can talk to you really easily you know, much better then alot of people, ill see you tomorrow" and he squeeezed my shoulder and walked down the street. i didnt know what to make of it so i just walked home, and ive had him on facebook for ages, i know they say your not allowed teachers added on facebook but alot of teachers and pupils do at my school, not in wierd ways and they dont with the younger years but the top end of the school they are allowed to accept under professional rules and stuff, so we have been friends on there ages, and we never email or anythign like that but i often have a nosy at his profie and see what hes up to, and when i got home this evening after he walkeed with me home, he had just changed his status to "really dont understand these feelings im having" so i duno whether to think this is about me or just ignore it and think nothing of it, btw im 15, 16 in two months, and hes like 20 i think, hes a student teacher as he tells me hes still in college, what do i do? cause i really like him!