

Speaking as someone with anxiety, try not to predict what others feel. You’re likely going to be wrong, and never in a good way. It’s not your responsibility to guess what others are feeling, it’s their responsibility to tell you. Always assume the most neutral opinion from others, and only change that if they say otherwise.
If you need to stay alone to recuperate, then go all-in on it. Let your friends know that you had a bout of anxiety. If you’re worried about them being upset, then not giving them a reason won’t help that.
I wish you the best, and please ask if you have any questions that I might be able to help with.
If you have some spare time, you might try visiting an animal shelter, just to give the animals there some playtime and affection. We are much longer-lived than our pets, and it’s our responsibility to make sure they have the best lives possible. I bet you did that for your kitty, and they were thankful for it.