Welcome to the board. Glad to have you here.
I understand some of what you say---our triad started off as a V.
Like you, "M" often talked about the "challenges of being the hinge". I think that was part of what gave extra inspiration to me and C to try to make a connection, so as to lighten the burden load off of him. I think it has helped some, even though he's still sorta "our group leader" in a way.
If you think your two girlfriends would consider even being friends together, it can certainly help, in my view. Just a thought.
Hope to see you around the boards.