Here are links to 11 articles, from PsychCentral's archives, that hopefully may be of some help:

7 Suggestions For Saving Your Sinking Relationship

When One Spouse Wants Out of the Marriage But the Other Doesn't

How a Little Space and Time Can Help Heal a Relationship Crisis

How to Start Over...Starting With You

Coping with the End of a Relationship

https://psychcentral.com/blog/12-way...-broken-heart/

https://psychcentral.com/blog/help-o...dium=popular17

https://psychcentral.com/blog/try-th...-broken-heart/

https://psychcentral.com/blog/lettin...dium=popular17

https://psychcentral.com/blog/growth...dium=popular17

https://psychcentral.com/blog/10-thi...dium=popular17

My best wishes to you both...