I hope you did or will "officially" withdraw from classes. I did not, and they marked me as having failed everything, just as if I had stayed and failed. It was a set-back that I didn't need.
I'm sorry to hear you're lonely. It's a new situation that I hope will improve. Being out of school is so much better. I never approved of school fwiw.
Can you get a dog? A nice one from the SPCA, maybe? That will involve walking the dog, and dogs stop to talk to each other, and you'll have a small chat with the other owners. There's no problem with what to say, it's always about the dogs. I have allergies, but I got a mini poodle from the SPCA.
I hope you don't worry too much. It sounds like you've got good and sensible people looking after you. It's normal to feel unsettled when everything is different.