How do I overcome peer pressure in adolescence ?!?!?

so basically guys, I got to a girls school and there are about 10 girls in my year that have lost their virginity and I'm in the tenth grade.

I'm finding it really hard to cope with the pressure of not being a "hoe" or a "slut" when some girls aspire to be called one of them. it's always like push up your tits, get some dick and it's so fucking hard to just say I'm in no rush like I'm only 14-15. what can I tell myself to not give in to the peer pressure at school and online ?