Who is Imposing on Whom?

Dear all,

I'd love to know what each and everyone of you think on this social dilemma. Recently, I may have stepped on my best-friend's toes due to differences in our ideas of how friends should be treated.

I went out with her and her long-distance boyfriend who is visiting Vancouver for a month for some dinner. It all ended on a high-note, and we spontaneously decided to cap the night off with some dancing and drinking at a club. Before we were to do that, we all wanted to go back to our respective apartments to freshen up. However, by the time I stepped into my own apartment, I realized that I felt tired; and I wanted to just curl up with a comforter, and zone out in front of the T.V., or a book. The reason being, that the previous night I waited for a friend to land from Toronto, and their plane was delayed from 12:30a.m. until 3:30a.m. landing time. By the time, I drove them home - it was 6:30a.m. in the morning. I promptly called my best-friend to inform her the bad news, and apologized. She gave me a curt, "Well, Fine." and gave me a double-dose of the cold treatment today when I called her. I know exactly what her beef was about. She didn't like the fact that I had verbally said, "yes" to going out, and immediately pulled back from it. Her stance is that friends shouldn't be unreliable to one another, and if you've said yes to doing something, you should do it. I, on the other hand believe that one should be able to change one's mind if one wants to. Why would anyone want their friends to hangout out of obligation? It's only clubbing and that sort of thing can be done on any night, and if SHE were to ask for help if she were stranded on a high-way, and I didn't show up, being upset would have been more reasonable. So, I'm throwing this out to the rest of you and wondering what you guys think.
Do you think that people should be allowed to change their minds, or do you think they should do something even after they don't feel like it afterwards?

It does say something about a person's reliability if they frequently back out on verbal agreements. In friendships however, both people make the choice to continue the friendship knowing full well of eachothers habits. Your "friend" needs to recognize this facet of your personality and make a decision as to whether or not they can deal with your spontaneity. You must also be aware of how it makes your friend feel when they have been counting on you for something and you decide to change your mind about it. If you can't meet eachother halfway, you shouldn't be friends.