It could be a bit of a pendulum swing for him - after so long not seeing people, he is catching up a lot and will ease off once their company is as familiar and normal to him as yours.
I really strongly feel at your age you need to develop a number of interests and friendships that fulfil you and not rely on a man to provide your life with meaning. That's a burden on him and if I were him I'd feel oppressed and need to escape, however much I loved you.
In your position, rather than moving out, which seems very melodramatic and a bit manipulative, I'd start a project to find an exercise or sport I love that requires a few sessions each week - wild swimming, cycling, running, bootcamps, tennis or netball team, and a new interest or social group - writing, music, acting, hiking, craft, adult ed etc. I'd also chat casually to him about some adventures you could have together now the world is opening up - a holiday or festival etc and see how enthusiastic he is.
You mention your anxiety and clipped wings - these are proof you want to work on your own freedom, happiness and sociability - you know they are damaged and deserve to be restored. You also mention not knowing where to start with a hobby. I so strongly recommend some form of exercise that you need to do at least three times a week because exercise is such a massive confidence booster. You grow fit and strong, you look and feel more youthful, your posture improves. And you don't need to make small talk - you just turn up, work out and go home. It's entirely win-win. Then once you feel more confident in yourself, because you are stronger, you can branch out and do something a bit more socially challenging.