Whose Fault is it?

Well, yesterday I ask one of my guy friends for a favor (see him more than a friend) if he can help me study for a class, but before that I asked him if he was going to be busy he said no. Then today i send him a text and asked him if we can meet up at 3pm, but then I asked text him again to tell him nevermind because I asked to study for another class. About 30 mins after that text, text him and ask him around 5. He finally text and said " Sorry, I made plans" I was kind of mad because we had made plans before and he said he wasnt busy. , but I changed my mind at the at the last minute. So, I should I be mad at him or is it my fault for changing my mind?

It's your fault for changing your mind. Men get confused easily, and you have to take this into account. Seriously. You just can't change your mind because 1) it's annoying and 2) men can't follow WTH is going on.