Um, you are PO'd. That seems pretty clear. Sounds like part of that is because of her leaving/not being able to be counted on/not living up to promises.
But there's more, isn't there?
All that said, may I suggest that you can tell anyone you like. Or don't. It's your life. It's your choice. What others do with it is up to them, but I get not wanting it to get around.
In the meantime, there is anger. Not sure why your IC can't see it. I've been where you are in that thinking (not with cancer) and I see it all over your posts.
I think you are well equipped to deal with that once you accept things more completelyt.
Am I missing something RT? AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."