He doesn't love me anymore

There are a lot of things that Hubby criticizes me for that I can do something about:

You're too fat.

I'll lose weight.

You're too messy.

I'll be more tidy.

But then he figured out something I have no response for:

I don't love you anymore.

Well, that's pretty clear. I tried to explain that in long relationships, people go through phases of being more and less in love with each other but being married means working it out and finding your way back, but he wasn't interested. He took his ring off. He says he just doesn't want to be married to me anymore.

This hurts so much that I literally don't know what to do with myself. I go through periods of feeling okay and then suddenly this panic starts to well up inside me and I think I'm going crazy. I think I HAVE to fix this, but he won't let me. He won't even try. I feel like a country song, like a bunch of cliche drama, like I'm never going to be okay again.

And now he's just blanking me completely, refusing to take my calls and ignoring texts, etc. It would be so much easier if we had drifted apart first, if we had been living in the same place but not really engaging. If we had been sleeping in separate beds or fighting all the time or SOMETHING. But a few weeks ago, we were very much a couple. And now there's nothing. And I literally can't handle it.