I threw away virtually my entire peer group from school due to them being complete dicks.
This actually helped me massively because it forced me to find new friends.
what I've noticed is that often people (or me) mistake another persons lck of self confidence as them not liking me when really they are just not confident.
go to uni having friends doesn't really matter having the ability to create friendships out of thin air is far more important.
and obviously that leads to friends.