It eats at you if you don't do something to get rid of it.
I write and/or do something physical to burn it off.
I used to think my H's signals were mixed and what worked for me was to pull back and have alot less contact. It allowed me to focus on myself and D's. I know that can be made to sound easy. It isn't. It takes focus. If you are in this moment, you can't be in the past (or the future).
I know you're hurting. I remember struggling to get out of bed some days. The pain and loss can be so overwhelming.
That is why we tell you to take care of yourself and GAL. It's all hard to do and it's worth every bit of effort.
How about taking a class or two? It would get you out and focus your mind. That you meet people and discuss ideas is icing on the cake.