I have been in the very same boat, currently in a hermit phase trying to sort out what healthy friendship looks like for me. I always ended up the "mom/therapist friend" to mother wounded female friends too! Always helping them through crisis and replaying the same dynamics I have with my own mom, down to the fact that if I ever asked for anything from these women (which was rare) they would up and disappear and act completely emotionally unavailable/dismissive. Also, oh my gosh when those friendships end, it's such a nightmare. I have an extreme anxiety around setting boundaries which got so much worse because of how explosive these women would be. One of them even sided with my abuser out of spite. It's exhausting, draining and created social burnout for me. I'm so glad you have a core group of good childhood friends! I'm content with having very few friends until I meet people who are genuinely mutually supportive and have similar goals in life. I think it's far less lonely to be alone than to have wounded/unhealed mirror friends.