What Am I Doing WronG?

At a family friends' house and i am being polite and helpful, as i almost always am. it was after the lunch/afternoon salade thing which was the most tasty salade i have ever had!, but anyway i had walked outside to get something from the car and 'rehab' by amy winehouse was playing on the radio when i was walking back down the stairs. i commented on the song like so "this song is so great" or "god, i love this song" and then i hear our friend who was a "is she making another snide remark or something?". i was a far away but close enough to hear her. i felt so insulted, it was a negative bitchslap. i try to be nice and i think i am, or am i really like that, making "snide" remarks? God damn it, why are teenagers so insacure?!