AM I A SLAG?? ANSWER PLEASE?

i am 16 and i have been texting this lad off my brothers phone because i lost mine when i was drunk in clumber park once. anyhow, i sent him a couple of pictures of me topless and now i feel ashamed. i am supposed to be going to his house on saturday and i feel so embarrased. i told him he could keep them if he wouldnt show anyoone else and he promiced that he wouldnt. i dont know what to do i feel such a slag. con i have some advice please. by the way i am still a virgin if that helps. please answer truthfully