Well, last March I put together a "Simmer Picnic" for yesterday, my youngest son's 54th birthday. (He's our webmaster.) Not a Birthday Party as such, per his request, but an extended family thing for 20 of us at a County, salt water park close to home. Because of my husband's age, I had to be able to get him back home for his nap, and yet not be gone long since I was the one with the permit to use the covered picnic area on the beach.
If you want to reserve a space there in the summer, you have to do it in the winter. My ex-DIL and very dear friend was in on all of this. As you all know from experience, it takes some organizational skills to pull it off.
Friday she emailed me that she was canceling. I was surprised, hurt and disappointed but it surfaced as anger. She has canceled out on me more than everyone else I know put together. She always has an excuse that makes her blameless. I lashed out and she replied "Ouch!"
Then I backed up...(it would have been better to not have had to, of course) and told her that the other side of the coin was that where she goes and what she does is her business, not mine, and how I react is my business, not hers. That's where Alicev's quote comes in:
"When we stop gossiping, complaining, giving guilt trips, forcing ourselves on others, and start taking responsibility for our own feelings and let other people be who they truly are - we do the right thing."
The clue in all of this is my reference above regarding my ex-DILs pattern of letting other people down by canceling at the last minute. That's what she often, but not always, does. She was just being how she is.
At 82, I think one of the last lessons I am ever going to get in this lifetime is that how I perceive something is not how it is. It sure looks (to me) like that's how it is...but others often have radically different takes on things.
My closest friend, who died in May, was a great teacher of this principle by example. Something would happen where I would get my feeling hurt and I'd come unglued. Then, later something very similar would happen to her and instead of feeling rejected etc., etc...she would be genuinely perplexed and say "How weird that he/she doesn't see how great I am." And that would be the end of it.

Love you guys!