GITGEZUGT; I have heard that unmarried women often feel left out as they see their friends marry.
As they do so they tend to associate with their married friends and singles are not invited to so many get togethers anymore or included in some activities that the married friends decide to do together.
If there was some kind of place for such singles to get together, not just for marriage purposes but just to have others in their siatuation to a talk to and associate with, so they do not feel so alone and left out, it might help with the problems you mentioned in your last post.
Also perhaps the married ones might go more out of their way to let their friends know they haven’t forgotten about them and still consider them their friends and try and include them more in their activities and socializing.
Also Shiurim, perhaps something informal without the usual pressure of a class or lecture, perhaps more of an open discussion type of gathering, not to commiserate or complain, but to have something to look forward to, to learn and ask questions and forget about the pressures of life for awhile; Where such singles can get together and learn more about bitachon, might help.