What's the best way to word this to the teacher?

Well, the guys in our class got us assigned seats at break and lunch. So, I have to sit with a girl that can be nice, but gossips all the time and two guys that talk about sex and dirty jokes and they cuss. The guys also attempt to sing explicit songs just to annoy me. I have no problem with the explicit singing or cussing, but the sex jokes are nasty while I try to eat. And the gossip is terrible to listen to and I know all she does is gossip about me when I leave the table. The weirdest part about this is that we go to a Christian school. They annoy the crap out of me. So, when I plug my ears and try to lock them out, they start making fun of me and telling me to grow up. I have serious problems with them. How do I word this to the teachers???!?! (without sounding mental)