I still have social anxiety and different phobias from being bullied as a kid, how do I fix this?

I've been made fun of as a kid it also is like being bullied if u think about it. I'm also 19 in college. I also feel the same way you do. I have had a couple of close friends but I don't really trust anyone. Now that I'm in college I only hang with one of my hs friends. I feel even worse now that I'm in college. Like I'm lonely becuase making friends there doesn't really happen atleast not making any close friends, more like only aquaintances. But yes I feel also a sort of anxiety in public, I feel like people are watching me, self conscious you can say. I am also very shy and I have low self esteem ( feel like others are better than me). I feel depressed cause I don't get to hang out with my friends. Sometimes I feel worthless. But no one can really tell. People sometimes think I'm good and secure but I don't feel that way in the inside. I do get shy, and I notice my voice gets all soft becuase I feel others can hear me and I know all of this has to do with my past cause I was not always this way. I can't believe people love to ruin others lives. But I just try to think positive and hope someday I will not feel this way. I feel the only way we can pick up is by trying to succeed and it will bring our confidence, secure ess, and happiness up. Like I want to become a elementary teacher and try to be the best teacher I can be so that I feel better about myself becuase I'm helping others. I hope it helps knowing your not alone and that we can do this!!