It it were me, I’d be cautious listening to my feelings. A marriage is not about feelings. It’s about commitment. And, in my opinion, a commitment cannot last unless it is built upon something stable and lasting. Feelings are fleeting and fickle.
So, it sounds like it’s time to re-evaluate the relationship in this case. That’s fine because people and circumstances change over time. You must choose to change with them. In some cases, you must battle your own emotions in order to do so. People who have been married for fifty years didn’t just get there easily because they married their perfect counterpart. They worked hard at it.
What to do if your spouse is the one who has given up, shut down, turned away, walked off, or made a decision that’s simply incompatible with the relationship? That’s tough. Like all things, it depends on the details. But I would suggest considering that just because your spouse walks away from the commitment doesn’t mean that it has to be over and finished for all time.
No one can give a black & white answer to this hypothetical. It certainly will involve some of the toughest decisions an adult will have to make. It’s because it requires decisions that I reiterate not relying on emotions. Use your intellect. Consider the rational options. Try to understand your spouse’s position.