Hello, I want to say thanks for being so frank about how it feels to be isolated and to be the only one in a group of friends without a baby. I really feel for you, and you've done a good thing by asking for help here. What you've said has made me admit this problem a bit more fully to myself - i think I've been in denial a bit, and have been so focused on the physical aspects of the disease that I don't deal with the emotional side of it. Always a bad idea as emotions that you ignore just fester, they don't go away.
I have lost large chunks of 2016 due to fatigue; I've had to limit physical activity a lot and spend a lot of time at home by myself. My friends can be very supportive occasionally, but of course their children come first and they mostly cannot spare time/energy to visit me now. I've had a lot of cancelled plans. I don't blame them of course, what can they do? It's tough realising and accepting it all though, and when I do see them, after they leave, it can be hard having seen their cute children and knowing it's something I will probably never have.
I found out that in the summer, four couples and their children (2 of the couples are good friends of mine) went as a group on a weekend break, hiring a cottage not far from where i live. The friend who mentioned it to me looked a bit pained as he said it. I'm not sure what's worse, that awkwardness and pity, or the knowledge that being excluded is inevitable for some years to come.
I know that getting caught up in negativity about this won't help me, so I'm trying to focus on what I can be grateful for, and think of the advantages of not having children. This isolation is not good for me though, and like the OP, I would benefit from meeting other women like myself.
I think I would be happier if I could find friends who can't/don't have children. In fact, I think I'm going to do a bit of google reaserch and see what I find. I know that my local Endo support group is unhelpfully far away, but perhaps there's something else out there...