And remember that being disappointed not to see you is not the same as being disappointed with you.
I'm pretty sure that I'm conflating some Serious Therapy Issues with how I feel about all these parties. (Short version: My needs/wants "don't matter" and I shouldn't even HAVE needs/wants, let alone express them. So while it *feels* like my problem is that I can't say no to a pool party, it's really my decades-old programming kicking in hard, since I've spent the last week caretaking the person responsible for the programming.)
This is, obviously, why I'm in therapy. Here's another short example of how fucked up I am: my mom's birthday is 3 days before mine (which is in 10 days, so don't delay on buying me a gold-plated unicorn, y'all). My stepdad told Tim and me that he thought a low-key birthday party/congratulations on not dying in surgery party would really make Mom happy. (Side note: I agree 100%. I'm not heartless. No pun intended.)
I told Tim later that I was glad that he didn't mention that the same weekend of the party (yeah ONE MORE GODDAMN PARTY) is also my birthday. And as I started to say "Because...", he said "Because YOUR birthday is special and should be celebrated on its own." Except that *I* was going to say "Because Mom deserves a special day." Hand to god, my first reaction about my OWN birthday is about what my mom deserves. I mean, there wasn't even a question in my mind. What I might want for my own birthday didn't even occur to me.
That is so sad. But I feel like recognizing that is progress.