Have you experienced realtionship burnout?

I'm looking for case studies for an article...

Hello, hope your Monday is going well and sorry to intrude with a journalist request…

I am writing an article for the paper about relationship burnout - the condition where one or both of you don’t necessarily fall out of love but lose energy and enthusiasm for each other.

Have you experienced it? Did it get better? If so how? Or maybe you took it as a s…