Confessions of a PT's GF: He always find a way to disappoint me

I don’t know why I’m making such a big deal out of this. I’m just not okay with it. I would never stop him from hanging out with his friends, I just wish he doesn’t do it by breaking his word. I always pattern my schedule based off of his and he ends up ruining it anyway. He would tell me one thing and then change his mind last minute. I hated it since I was young. I hate broken promises and vain words. I’m the type of girl that gets excited a lot. So when he tells me something, I imagine doing it until it happens. I like to look forward to it. And then he cancels on me and everything just collapses. He always find a way to disappoint me no matter how hard I try. I think that’s his specialty.