#1 – Your home together is still his favorite
You have been there with him for years, you have shared many ups and downs, you take care of him, and you may even have kids together.
To him, you represent this safe place where he can be comfortable and completely himself. The reason why he had an affair could be blamed on his cravings for trying something new and not because he wants to replace you.
The idea of leaving you is not even an option in his head because it won’t be the same anymore. You both might have lost the love and passion for each other, but the respect and friendship remain, which creates a comfort zone that he doesn’t want to lose.