COG - I'm am sorry to hear about your situation but I'm glad you've found us. It looks like you're getting good advice.
One common theme you've seen is to GAL. This is very important and it's for YOU. This about becoming a better man. Find things you've haven't done in awhile and pick them up. Find things you've always wanted to try and try them. Volunteer. Re-discover yourself. I think the hardest part to GAL'ing is getting started in the first place. Once you get it going, it tends to gather momentum and build on itself. Hopefully, you will remember what it feels like to truly live again. And you MAY pique the interest of your W, and as Starsky said, become the better option.
In reference to the concern you posted on my thread - if you want to start running again and it's for YOU, go for it! Don't worry if your W thinks you're copying her. This is only one part of your GAL game plan anyway.