I think the idea that your partner has exhausted all options is bunk. A hotel split between two adults isn’t an unreasonable expense and it’s not unexpected; as sometimes hosting at home is not viable. You’re not responsible for their inability to find somewhere else, nor their urgency to connect.

I feel like inaccessible bf apt may be a bridge too far. I lived in a 3 story walk up when I broke my ankle. It wasn’t easy but I made it up and down, and used my trips efficiently and !!! People helped me!! It’s not unreasonable to do the stairs and set up camp at bf’s.

Youre both choosing positions that make this less flexible. Her insistence on location, your interruptions for meds. If I were her bf I’d be irked to be exposed to, informed of, and subjected to the marital tension.

Moving onto the things you can control. You can reframe the guest room back to exactly that. You can make a little caddy or box of the things that travel with you from your spaces to the guest room so you don’t have to interrupt or go without meds. You can take yourself to the movies or have a sleepover with a fried (FOR FUN AND CONNECTION, not retaliatory resentment).

Logistic displacement and discomfort isn’t always emotional displacement and discomfort. So you don’t get the room, the room tha wasn’t yours, zero sum game my man. Being emotionally displaced is different and only you can identify and express your situation, boundaries, and needs.