Meeting my friend after many years?nervous and in love with him

well, he was my friend and family frien when i was a kid before i move to a different counrty, and now i am going to meet him after 9 years and he is boy and i am girl and year older than me. i am so confused and nervous now and shy too. i dont want to meet him, because i am different than than before, i wear different type of clothing. i feel so different now, i dont know how can i greet him. and by the way i feel nervous especially near boys and the last time i meet him he was 9 and now he is grown up so am i. i dont want face him, but i have to cuz they are picking us from the airport. what can i do, beside i dont dislike him either but i just feel different, i love him not as a friend though. do u think in these 9 years he has forgotton our friendship, because the last time we talked was when he was 12 and now he is 16. so gave me some advice, in what way i can impress him, and gow can i greet him, even if i am nervous, any advice that u would think will be helpful cuz i really really in love with him even though havent seen him for years. and i dont know if he has girlfriend/not, so do u think there is way i can ask if he has one and i cant believe that i am in love with him, i tried to forget about that but cant. plz help me out, i dont what to do, cant face him but had to and i love him so much but i am afraid of what if he doesnt like me as friend or any at all.