u dont sound slutty, dont b so hard on urself. ur trying to get on nd figure out ur life.
you said

"he talks to a girl and i suspect that she is just more than his friend. i think she is his girl friend. he knows that i dont like this but even then he talks to her infront of me. he has told his friends about my feelings for him and they all make fun of me"

it seems to me tht he doesnt respect u or ur feelings. i kno it may be hard right now, but to me he doesnt seem like a good guy. u shouldnt base your feelings on his looks. what if he gets in an accident tomorrow and his face is scarred for the rest of his life? u need to find someone who loves nd respects u. dont worry, you will find ur soulmate.

"he is very handsome and i on the other hand am simple looking. "
do not judge urself, someone is looking for a beautiful person just like you. it will happen.