How do I ask my parents for professional help with anxiety?

This is has been going on since 6th grade when I was bullied a lot and I guess it made me isolate myself from people and everything. I m a freshmen in high school now. I don t have many friends because its hard for me to make them. I can t talk to people. I don t like going outside. I can t order my own food. I can t even do things in front of people without sweating or shaking. I barely even talk at all, and i eat lunch in the bathroom because I don t like eating in front of people in the cafeteria and its way too many people. I m always alone and I don t want to be. I really wanna make friends and be normal but I physically CANNOT make myself talk without feeling like crying or throwing up because i m nervous about every little thing. I wanna talk to my parents about it but they probably won t even understand it and they ll say i m just "shy" even though its hard for me to even leave the house. People already think i m weird because I never talk. I just wanna be normal and not have to be scared of everything :((