HLP! I am love sick! :P???????????

I started liking this guy at camp and he liked me and i had to leave early from camp on the last day which was a friday and i talked to him all saturday but then like he had to leave for camp sunday and i didnt get 2 tlk to him and now hes gone and i just cant keep my mind off him and im so worried if he still likes me even though i no he does hes just gone till sat. and i dont think i cant wait! i no the week will go by fast but i just think about him every sec. should i right him a letter? idk wat to do! pleaz hlp! i think of him every other memory! Ahhhhh!!!! Im just <3 him! :((((