i need some help i think its hormones or am i horny?

ok my friend who is a guy who is like really popular is allways wanting to hang out with me like last week he asked me if i wanted to go swim at his house with him and watch some movies but i had to work that weekend .....and this weekend he wants me to come over and chill =] i really like him but it think he just wants in my pants he texted me the other day and wanted me to send him some naked pics of me an di did=[ i feel really bad about cuz i dont do that for just anyone .........but this weekend i think im gonna go over there i no hes gonna want to have sex but is it a good idea? hes so sweet but i dont want to get prego but he reALLY DOES MAKE ME horny=] i dk though im soo confused!