I really like him :) what do i do?

i liked this kid Erick, and i was talking to him and i told him i liked him : ) well. i met this kid Josh.. and now i reallly like Josh, and he really likes me too. he put the song "i'm yours" by Jason Mraz on his myspace and told me i am absolutely amazing.i really like this kid , well josh and erick dont like eachother and i dont want erick to get all mad about it. how would i tell him?