It’s pretty bizarre that your parents are pressuring you to drink before you leave for college.
I’m the same as you - I decided to not drink in high school, and I’ve kept that commitment all through college and up until now (I’m currently a little more than a year out of college). It’s perfectly possible to not drink in college, and in my experience it didn’t create any awkwardness at all. I also had a couple of friends who were non-drinkers.
Drinking is pretty bad for your body and I think making a commitment to not drink is a great idea and totally practical. (Also, if you find people who have problems with your non-drinking commitment, they’re probably people you don’t want to be around anyway).