Nope... I am the opposite. Kinda calm, and enjoying NYC/Manhattan being a quitter place.
I am mostly an introvert though, but had some major FOMO before covid.
I attribute this sense of tranquility/calmness as all that FOMO is gone, since pretty much everyone is in the same boat.
I also have created a routine and I go out every day, and work outside for at least one hour. Before it was in the parks, but now that is a bit chillier at outdoors at coffee places. Many coffee places have outdoor seating, so I use that as much as I can, before it gets too cold. I bundle up, and have noticed that I can work outside up to 42-44F so far. Not sure how will it be one it gets colder. Weather in NYC has been lovely so far though.
I miss playing sports though (soccer and volleyball), and the occasional dating, but I don't feel bad at all since everyone is in the same boat.
For the winter, I highly suggest to get some good yellow spectrum lighting in your apt. and also buy a powerful projector, and project movies/games in a whole wall. I have noticed that using a 2000lumens projector daily, instead a normal TV has made a huge improvement in my mood, and almost eliminated that SAD feeling you get in November.
TLDR:
1. Develop a routine where you go outside, to work/read, for at least one hour a day. Be friendly with the local baristas. Just somme chatting and in-person interaction every day, makes a huge difference.
2. Visit/explore different parts of the city, every week. Use a bike, so you don't have to use public transportation.
3. Buy a powerful projector, and watch TV/youtube, play games on it, for those days that the weather is not good.
4. Make your apt, room ambient look and feel nice, get some good lighting.
5. Get a regular cleaner. (I usually leave the apt. for most of the day when a cleaner comes). A clean/neat apt improves your mood a lot.
6. Start new things (either projects, books, games, whatever), so you don't feel stale, and experience new things.