I am starting to feel let down and abandoned by everyone I know

Over the years, nearly all of my friends have disappeared out of my life and I don't know what to do anymore.

I had a very close friend way back when I was a teenager. Back then, we spent nearly every day together in and out of school, shared all of our thoughts and secrets and even went on vacations together. After finishing school, each of us moved to a different city but we kept in touch through phonecalls and letters. Then the contact gradually dwindled away, through none of my fault. Phone calls were never returned. Eventually I gave up.

A few years later, I got an unexpected mail from this old friend telling me that she had just had a tragic and unexpected death in the family. I reached out to her, met up with her, tried to just be there for her. I made sure to message her once a month just to give some encouragement and emotional support.

Fast forwards a few months, and she's stopped replying to my messages again. Even just a quick "was thinking of you and wondering how you're doing" went unanswered for weeks. Now, I'm currently visiting her hometown because I have relatives there, so I dropped her a message whether she would like to meet up with me and have a coffee or something. She initially agreed, but only two hours before actually meeting up she's now told me that she can't meet me because she's feeling a bit unwell. Maybe tomorrow.

Maybe tomorrow. And I'm sitting here crying because I feel like I'm being let down and abandoned again and again by people I'd considered friends. People that I've always been there for, but now there's nothing in return except for the feeling that apparently I'm not even worth a few hours of their time once every half year.