I can relate too. I've learned not to promise too much because I always wind up regretting it. Something that sounds great on Monday morning usually loses its luster by mid-week, and by the time the event rolls around I REALLY don't want to go. So it's best if I don't commit to anything, and what I usually end up saying is "I'll try to make it, but if I can't I'll let you know". And that's what I do.....I'm not a complete jerk about it.