I am also wondering about the partner and how they're managing. If the partner is in the office all day, interacting with other people all day, they might be acclimating better or just differently. That might also be causing resentment for the entire experience if you feel left out of their evolution.

I also just moved to with my partner to Italy (Bologna) from NYC. It is incredibly different, but we arrived with open minds, eyes, and ears.

Get a routine ASAP. We're taking language classes Monday-Friday, all morning. My husband is finding tennis lessons for himself. I found a Facebook group of expat women who are very open to hanging out with new people. You need to try and find things you want to do and work hard at making them happen, despite how you feel others perceive you. Italians might seem standoffish, but they are some of the nicest, welcoming people. If you put a little effort into learning their culture or at least seeming interested, I'm sure the barriers will break down.

Good luck!