Don't make a promise if you don't remember

Well, guys.. i just wanna share what happened to me these days. So, a week ago my BF promise me that we will go out together at this sunday. Wow, it must be special day for us... but, yesterday i was ask him about this sunday. "will we go out this sunday as planned?" and what he say?? "what? am I told you that we will go out this sunday?". Ok, now I am like the stupid girl. He make that promise, but he never ever remember it. What the hell boy?? 

So, guys.. I just wanna tell you about the moral value on my story. 

Don't make a promise if you don't remember!!

Yeah.. I am upset. But I am not angry with My BF. I just feel "ohh is he my BF? but why he act like a girl?".
well, girl never forget her promise. But why the boys forget it? So, please boy... Don't hurt your GF with your promise that you made it then you will forget it...