Still lonely though I'm busy

I feel a lot of feelings accomplishment, confidence but then on the other coin I feel anxiety, insecurity and fear. I have been doing my jewellery course for two months already I have accomplished a lot done a lot of assignments but there's still something missing. I remember always complaining that others didn't like me and I was different but I look at my situation with other people through new eyes and I'm starting to see that I am the one distancing myself from others because whenever I want to say hi to that acquaintance I am filled with doubt and anxiety mainly I feel like a burden to them. Basically I realize that my insecurity is stopping me from getting close to others and not that others don't want me. I'm just wondering how I can change these thoughts that I'm a burden and my feelings of anxiety around people. When it's come to psychologist I always talked about my family and not my friends because I never have honestly felt that anyone was really my friend. I just see clouded faces in a crowd. I often feel like others don't truly like me and I find myself faking smiles though half of them are genuine when people greet me. I know this is anxiety making me think this about others but I feel like I have tied every technique with no avail. It just sucks and it's hard and I don't want to go to bed filled with worries every night anymore.