My grandma: "I've been to all my grandchildrens' graduations" Also my grandma: *didn't come to my graduation and instead went on vocation*

So, I'm not one of the grandchildren then? Thanks person who I thought was my grandma. Means a real lot to know that not only was it more important for you to go on vocation (and lie about it as well) right when you knew in advance about the graduation date but that even now years later you tell everyone that you went to all the graduations of your grandchildren. When my dad confronted you about it you said I didn't count. I feel real loved. Don't mind me while I go soak in a tub full of bleach and tears.
No, but seriously. at this point I'm not even sure if I should invite her to my college graduation next year because she probably won't come to that either and I don't need to spend another graduation day feeling like shit over people who don't consider me as family.