Back up the data. For things I do with ChatGPT I ask it to only use Google Drive for Markdown and other files, not ChatGPT's own Space file system. You can ask ChatGPT to do this migration for you too. This makes moving to other AI such as local ones as you said quite easy.

I also use ChatGPT as a self analysis tool and it can synthesize things I've said before in passing to show patterns over time, which is the killer app, sort of like a therapist but much more nuanced and detailed because it has "infinite" memory and ability to piece things together.

However, at the same time I do have lots of friends and go to social events, which I suggest you do too, as it's not healthy to only talk to AI all the time instead of others. It's hard making new friends and it does require sacrificing such as going into the city for events as you said but it's worth it. Just the other day I had to go an hour for a meetup that I thought of skipping but it was very enlightening and I'm glad I went as I met some cool new people.