The experience of this old chook (almost 60) is this. Whenever there is a major change in your life, there is some sifting out of "friends". When you marry, that takes you out of the "single" camp. Groups of single young women might choose to cut off the married one. She sort of cramps their style. Similarly, when kids come along, some childless step aside. They really have no interest in sleepless nights, vomiting and trouble latching on. But by far, the biggest life change, is a life threat. You have rung the Existential Bell for some. FFS...if you can get cancer, so might they...right. Their perceived immortality balloon has been popped. I don't know that they are afraid of you per se, but of what you have brought into focus...the fact that every person born, will at some point die. Truth be told, you're better off without having to drag any extra baggage around with you at this time..a bit of pruning always improves growth, for plants and for people. Lots of hugs ((( hug ))).