Good luck, Indigo. personally, I think t was bad for for them to get thethird party friends involved, but that's another issue. when this has happened to me (I have Bipolar I) I have found that while it is sometimes possible to explain and mend the hurt that has happened, even forgive, that the basis for a free, giving friendship can often not be restored. Sometimes the people involved are aware of what it means to have these illnesses, and can better start over, otheres aren't sure of what it means and would rather keep their distance. Once burned, you know.
I'm so sorry this has happened to you. HUgggs, and hopes for the best, dear.