I had hoped to find a similar group here....but it seems that in person support groups are harder to find...a pity I think as although you may know people who have had breast cancer, the collective experience of 10 - 20 women is far better and in the case of the Busom Buddies, we had a social worker assigned to us to facilitate and she was just great at making sure we stayed within our boundaries or had the clinical material to point us in the right direction if we had specific concerns or problems. She was also associated with the local hospital which was a great help.
Still....it is important to have some contact with others who are going through this....and there are several very good on-line communities for people who have advanced stage cancer. I hope to be able to give you a whole list of links soon..but I will give you a couple and hope you can join in and add more. I prefer to go to site which are monitored as there can be some really way out people and there are those who are "snake oil" salesmen who are advocating "cures" which in reality are just a profit maker for them...or those who can get very negative.
Here are some of the ones which I think are pretty darned good:
This webpage talks about the various support groups sponsored by Metavivor, as well as how to start your own and what to look for in a group.
(Health Central's "support group" functions through their share posts. PJ Hamel and Phyllis Johnson are the two people I have had the most contact with....and I thoroughly enjoy them.)
Even so....you will find that from time to time you will need to step back, or avoid some posts. We have cancer. Some of us won't make it....and that makes it hard. You really do mourn these people when they die. However, I always feel grateful that I got to "meet" them.
If you know me...you'll know that I am quite fond of A. A. Milne's Winnie the Pooh. Even though it is approaching 100 years since Winnie the Pooh, bear of very little brain and more stuffing that he ought came upon the scene, Milne had wonderful insight and the book is filled with nuggets....
“How lucky I am to have something that makes saying goodbye so hard.”
― A.A. Milne, Winnie-the-Pooh