My social anxiety is changing who I am

I have social anxiety. When I go out anywhere in public I always feel like I’m being watched and judged, and I know that I’m probably not but still it’s not a nice feeling. I have this constant urge to try and look perfect and do everything right just to fit in. I absolutely love my friends but I’m not even myself around them; I don’t sing/dance, I don’t wear certain clothes and I don’t talk about certain topics (all things which I would only do around my family).

I feel so restricted. Like I’m trapped inside of my own head.

I always practice conversation answers in my head and think of every possible situation that could happen.

Please give me some kind of advice. I don’t feel comfortable talking to anyone about it in person and I feel like I am the only one who can fix this💓