I’m 19 and when the pandemic started I was 17, the pandemic and many other things in between significantly increased my anxiety and now it got to the point that I’ll leave the house only once a week and refuse to eat meals if I’m not at home, at one point during this summer I went almost a month without leaving my house.
This isn’t my proudest moment but at one point this year I had food delivered at home and to not have to talk to the delivery guy I lied about having covid and I left him money (tip included) in a bag outside the door and told him to drop off the food on the porch. 
The thing is, my family extremely worried about me and my mother keeps inviting me to go out to eat and I keep making excuses, I haven’t been to a restaurant with her in several months and tonight she wants to grab a bite and despite me saying that I’d rather eat at home she keeps insisting that we go out to eat and I feel bad telling her no. My friends have also noticed this so they started ordering stuff for me or trying to get me to order something and my sister has invited me to go visit her or go on a vacation with her on three different occasions and I keep turning her down. 
So my question is, does anyone have advice on how to feel less anxious eating in restaurants/fast food places? The thing is when I’m eating in public I feel like everyone is watching me and is disgusted or making fun of me, a lot of times I literally shake and have trouble finishing what I ordered or I just order the bare minimum or nothing at all if possible