Hey there, Ashes
How have 1600+ people looked at this post, but nobody responded. It lends substance to your concern that a lot of people just don't seem to care (or find it too hard).
Having been around the mulberry bush a few times, I do know that people with true heart .. the real stayers, the ones who are there for you thick and thin, are extremely rare.
People pretend it, all the time.
The make the sounds of love & fidelity. But yes, it's no surprise that people can fall by the wayside when you're hit by hard times.
In many cases, it's not even a mean-ness of spirit .. it's more of an awkwardness. (Or at least that's a nicer excuse), "Oh, she's suffering so much, I don't know what to *DO* or to *SAY*"
(When in reality, all that you really need to do is BE there. Being there matters)
Me, I'm lucky, no abandonment - in fact, the opposite .. but I'm the kind of person that doesn't nourish acquaintances, I only put time and energy into full-blown friendships, and I've made good or lucky choices.
What I'd suggest is - you need someone in your life. (Hell, even if it's just a cat, that might help). You sound in dire need of emotional support and nourishment.
You could look at professional help for depression & isolation, but personally what I'd do is choose a place you like and spend a lot of time there (example, local library). Read, if reading gives you pleasure. And if you make eye contact with someone, start to chat .. take it back to the natural basics.
And if a connection forms, let them know about your cancer, your loneliness, but don't be .. well, you know .. overly clingy. A friendship that forms in a dark time is so much better & more inspiring and nourishing than a false friendship that abandons you on a dark day.
Anyway, there are decent and kind people out there, I suggest you find one or two and form a circle of friends. Sure, there are cancer support groups and stuff you could connect with ....
... but .. that doesn't quite sound to me like what you need. You just need a friend.
Anyway, like any success in life, it's trial and error, right ?
Sounds like you have skills and instincts, revive them. When you meet people, just look in the eyes, you'll be able to tell if they're a goodun or not.
If I were sitting on a park bench watching my kids play and a stranger came and sat next to me and said "Hi, I'm sorry to bother you .. I just .. I'm lonely and I really need a friend" .. I like to think that after sizing them up a bit, I'd invite them home to dinner.
There's good people out there. Don't give up, you can make new connections and find the nourishment you need.
Where there's life, there's hope.