I have a crush on my ex teacher..lol..i mean i am not his students anymore...PLEASE HELP!?

okay so i really like this teacher of mine...i am no longe rhis student...i graduated 2 days back..i know something was there like MAYBE he like me too? but i am not sure..he always kept it discrete i guess..ya he's smart and knows whats right...grrr...so on my graduation day he never asked me for my contact information...and when i asked him for his "email" p.s. i didnt ask him for his number cause i was hoping he would do that..but he didnt..anyway so he gave me his school email id...wtf? i dont know what to do...should i add him on facebook? email on his email? and how long should i wait to contact him? P.P.S. he is NOT married..does not have a gf..i wouldnt have fallen for him if he was..and he is only 26....and i know this is all cheesy...but I REALLY REALLY LIKE HIM...i WANT this to work out..for a change..i know something was definitely there...please help.. :)