I feel like my social anxiety is ruining my life.

At school I try to fit in with the other people but everytime they try to talk to me, I get nervous and I don't want to take off my mask. I don't feel confident without it and everywhere I go I always wear one. I remember everytime we would do a presentation I would always cry and I would be so embarrassed after, I felt like everyone was judging me. I hate it so much because I just want people to like me, but my social anxiety keeps me away from being fun or having conversations with them.