Most Helpful Girl
I was in the same situation as you 2 years ago.
I wasn't open to people and I was pretty shy, except when I was with my close friends.
Well someone told me that I shouldn't be so shy cause no one will want to get to know me. And it was true.. so I started trying to be more open and social with people. I tried to put away my shyness and to talk more.
And guess what? It worked. At the beginning it wasn't easy at all, but the more I started being social and talk to people the more I was being less shy.
So yeah try to be more talkative to people around you. Start with your classmates or coworkers and you will see soon the difference :)