Oh, Malina. This sounds so upsetting. As Sveta says, it's all the more difficult because it is a pattern. And yet there's no sense of ritual to it. I mean...it would be one thing if you decided ahead of time: we will do this for three more years. Then, you could plan your life around it somehow, wrap your mind around the change. Organize yourself, perhaps consider what YOU would like to do if this move is a given. This way, it's too sudden -- you can't plan, and can't make decisions for how to live your own life there in a way that furthers your own dreams.
I agree with Sveta -- sitting down to talk about this together and the 'whys' could be helpful. Also, I think it would be useful to figure out your own bottom line. You aren't as happy in FL, it seems. That is partly the weather, partly your isolation, partly other factors. But listing what those are, and making that crystal clear even to yourself, will be helpful. Then, even if you decide to go -- perhaps you can take steps to address those.
Here is one example from my own life. About a decade ago, my husband decided that he wanted to take a sabbatical in the Pacific Northwest. He loves the area, he had a few friends and contact there, and he wanted to try it out.
I wasn't against the idea, but unlike him, I'd be giving up my work, my social life, and enduring a big disruption to my creative life. I'd also be distant from my frail and aging parents -- an important consideration. Not only that, I knew beyond a shadow of a doubt that the transition would be really, really difficult for our daughter, and I would be the one bearing the brunt of that. We would have to get her organized in a new school, etc.
Anyway. I listed all my fears and reservations. And I also listed possible benefits of the move for me. AND I tried to think about what I could get there that I could not get at home.
I discovered I could further my education there in a way that wouldn't have been possible here. So I applied for a program, was admitted, and ended up having an absolutely fantastic experience. We extended our stay for two more years. I made a ton of friends. I got more time for my creative work. I even got a scholarship that paid for my program. Yes, it was really rough emotionally on our daughter. And life there was more expensive than at home. But overall, it was a great experience.
The reason it worked for me, though, was because I did not feel that I had simply tagged along on his coattails. I had made the choice for myself and done something that I wanted to do while there.
I am wondering if there is any way you could begin to fulfil a dream of your own in FL. It might be something tiny or it might be something big. But if you could do this, perhaps it would feel more like a choice you could support.