Here is where communication plays a big part. I think many marriages reach this point. When it does, the couple needs to talk about it. There are ways to rekindle the fire.
A friend of mine was complaining that he wished his wife would try certain things in the bedroom. He was even considering looking elsewhere to satisfy his desires. I asked him if he had ever talked to his wife about fulfilling his fantasies. He said no. I was like, “How can she know what you desire if you don’t communicate it with her?”
It seems some people put a lot of effort into seeking another to satisfy their desires. If they would put that effort into their marriage instead, they could keep their marriage alive.