im not a party person.. should i rush?

apparently it's not at all. and don't even think about going outside with a bowl

Depends on what you don't like about partying. If it's alcohol you don't like then you can go out and have fun and be with people and not drink. There are girls who do that and some guys too. If it's meeting people and being social and having fun in a large group that you don't like, then maybe you aren't a group person. There are tailgates and date nights and socials and formals and all kinds of things to go to in Greek life. These are parties. They are fun. You don't have to drink, but sororities and fraternities are social organizations.

a group of girls in every sorority, including top tiers, don't drink and still have a great time and have the same sisterhood and make friends just like the girls who do go out every night.
XO, Alpha Gam, AXO and AOPI all are majority dry and still all have great reputations!

Pi phi, zeta, gphi are the big party ones with majority party girls. Chi o, alpha gam, alpha chi, aopi, ddd are not party ones with majority non party girls.