That exhaustion deserves to be taken seriously, not talked out of — if you've been bending, adapting, carrying the effort, then hearing "just change more" would be the last thing you need, and it's not what I'll ask of you.
Often, the people who feel this way have been changing in the wrong direction: giving more of themselves while getting less, until there's nothing left to give. The work here usually isn't about doing more. It's about being honest, perhaps for the first time, about what you need and what hasn't been working — and helping your partner truly hear it.
If anything shifts, it shifts for both of you, not just you again.