Am I right to be upset?

I spend every other weekend with my father and he works the week days. The weekends in between I'm away. Every weekend I have with my father he says we will go out and do something, but we never actually do it. Like yesterday and the day before he kept saying we would go and do putt putt or something today, but just an hour ago he said we couldn't do it today. I get that plans don't always work out and sometimes the change, but this happens almost every time and I'm so sick of it. I'm completely okay with not going out and doing things, but what I'm not okay with is him saying we can go out and do something and then not do it time after time. This is like the fourth week in a row he has done this. I've tried talking to him about it and he said he would stop doing it but he clearly hasn't. I'm just not going to get my hopes up over anything he says anymore... I'm 15 years old and I want to go out and do things with him and make memories while we still can before I go to college and barely see him. Am I being irrational/bratty for feeling this way?