22sixandahalf your post resonated with me . I had quite a few school gate friends that faded away and sometimes I see the ones who live locally and go to say hi and they look straight through me or pretend they haven't seen me . I recognise them so it seems strange to me . Now I do the same , walk on by .
I was particularly close to one and would pop in for a coffee etc then she started being too busy . Occasionally I'd see her out and about and we'd say let's catch up , go for lunch but everytime I'd suggest getting a date she would say she would ring me and of course never did . I decided she didn't want my friendship any more so I just stopped . Two years went by and I got a message from her out of the blue asking if she could pop some forms over that needed a signature witness , she was in a dreadful hurry and thought of me . Unfortunately I wasn't available for her need at that time .
I don't really set great store by friends anymore as this sort of thing happens a lot . I feel as people befriend you for what you can offer them . When my children were young it was normally childcare during school holidays , husbands DIY skills or just to drain you with all their depressing problems . It always feels so one sided.
I used to be the one that hosted gatherings , organised birthday outings , took an interest in other people's children , shared their joys and griefs . When I stopped , these friends faded away .
I'm my own best friend these days , I talk to acquaintances but I don't get invested any more and sadly that applies to my siblings too . You can't let yourself down can you lol