How to enlarge my social circle?

Greetings! I am a third year university student and I am looking to enlarge my social circle. I am simply amazed at the people who manage to get hundreds of likes and of comments on their social profiles. They seem to know literally everyone in the smallish city that I live in which gives them a huge advantage in literally every aspect one could think of. I, on the other hand, only have a handful of friends. Truth is I would not even want to call them friends, since I am sure that none of them would come to my aid if I ever got into any sort of trouble. I want to delete them from my life and start from scratch!