T.S.
Well I am not divorced, but I have been a part of what you are talking about. My husband and I were great buddies with two couples who ended up getting divorced. I feel like I tried to make the effort to stay connected but we did grow apart over time. I think in the beginning being with me was an unhappy reminder of what was. Eventually our paths just changed. I was still home with the kids and volunteering, etc. and both of my friends were hard at work building new lives as single mothers, going to school, getting a job, etc. And I was so proud of both of them!
I did reconnect briefly with one of those friends recently, and we had a great time catching up, but it's clear our lives are pretty different and just getting together for lunch takes quite an effort.
Good luck with this transitional time. I'm sure you'll come out with your strongest friendships in tact :)