I'm sad that happened to you, when you needed support the most! I had something similar happen when diagnosed with cancer over a decade ago. Lost so many friends, they just vanished. I know people say "they don't know what to say". When you are struggling to adjust to life that isn't how it used to be, physically, mentally and socially, you don't have the stamina to be the initiator too. I've learned to be a bit more "aware" of one-sided relationships in my life, where I do all the giving and it isn't reciprocated. (But still find myself getting blind-sided once in awhile by people I thought were friends). Time is of the essence these days and so is energy. I hope with all my heart you can find another group that is intellectually stimulating, so you can stay put until you are truly ready to move on. Hugs.