My heart is so full for you as I type this! I'm a professor, so I totally get the end of the school year rush, and all that goes with it, and how hectic and wonderful at the same time to see the seniors freaking out and then suddenly whoops there they are at graduation and you can see a glimpse of the future in their eyes! It's the most fantastic and bittersweet feeling ever, isn't it? The past, present and things to come right in front of our eyes, and we had something to do with it - awesomely humbling!
I'm so sorry about your father. My own father, a stubborn Scots hillbilly, who left his own high school graduation to fight Hitler in WWII, and liked Europe enough to stay in the USAF through the Carter administration, recently found the one battle he couldn't win (to his great surprise, was not the ones with his teenage daughter!), but with Alzheimer's disease. He's nearly 96, and remembers Vietnam, Korea and WWII like they were yesterday, but can't remember what he had for lunch. Or that his sister died last year.
He still knows that I knit, however, and thoroughly enjoys being my model, no matter what I happen to finish! Of course, there's no telling where the FO might wind up when he models it, but that's another story....
From another daddy's girl, who is in the long goodbye, let me tell you that every minute, no matter how trivial or what you are doing, is precious, even if you are just sitting silently and thinking together. My "thing" is that I have rigged my iPhone through the Apple TV device to "mirror" onto the TV screen in both my knitting room and his den (his VA nurse does it for him) and we sit and hang out while I knit and he sits in his recliner and does whatever. He's still not convinced that I don't have a TV show, or that I'm not on Dr. Who, but it works well for us!
Hugs to both of you, and I hope your Brambling gets you through!