Is anyone else as easily defeated as I am, or am I really that lazy/pathetic/weak?

Tonight I was invited by a friend to see a movie on Friday. I don't currently know what I'm working on Friday but I'm about 90% sure it'll be 10-5, and the movie is at 7. It takes me an hour to get from where I work into the city for the movie. I told her I'd rather do it some other time and I said that I had absolutely no idea when I was working because I didn't want to come across as saying that I'm not willing to try to get in to see her.

That was exactly what it was. I feel terrible. But it happens with almost every plan I make. If there's going to be the slightest bit of difficulty, if I'm going to have to confront someone like my boss (who is extremely irritating and I doubt has a very good opinion of me, so she's not really inclined to care if I get off work on time, which I almost never do) or drive the hour into the city during rush hour on a Friday, or have yet another stupid argument with my family over which vehicle I should take in, and on top of that Fridays are our busiest days so I'm going to be tired ... I just can't deal with that. It's not that there are any huge complications; it's not that I couldn't deal with any of these things if I had to, and I have in the past. But the thought of doing it ties my stomach in knots.

I'm a bad friend. I can't make time for my friends. I'm weak because I COULD make that time and it wouldn't be that difficult, but the slightest difficulty has me running in the other direction. When I come home from work all I want to do is curl up in front of the tv, not talk to anyone, and deal with the least amount of stress possible. Somehow, going out and enjoying myself has become one of those stressful things I avoid. Ugh.