HELP!!! IM IN LOVE WITH MY BEST FRIEND?!?

ive known him since we were babies and we always had a strong connection.i tell him everything,and he tells me.i havent seen him in years and i missed him . then yesterday i finally saw him at first it was akward and we ignored each other.he kept on giving me that face that says why the feck are you here! he was hangingin out with another girl and started flirting with her. that made me so mad but then i finally had the guts to go talk to him.we laughed and smiled like the old days and started to give me all the antention.but then when he had to go he was goin to give me a handshake! A HANSHAKE! omg it wasnt like the first time we didnt hug.so instead i made him give me a hug and he was surprised. i dont get it we always used to be afectionant to each other.then when he left i felt depressed and wanted him next to me. he always comes in and out of my life and i think i love him. he just doesnt know it. i dunno if he has a girlfriend or anything lke that.i didnt want to tell him kuz i dont want our friendship to be broken.we had so many great memories and i dunno if he remembers. when i looks at him i can see some feelings 4 me like i do 4 him. but i dunno should i tell him and risk our friendship or shld i just ignore my feelings 4 him that i had since we were kids? plz help