On Saying No...

Sometimes you just have to say no.  I know, I'm really not good at this.  In most areas of my life, I am downright awful at it.  I mean, I have no trouble saying it about exercising or grading, but sometimes I just find myself biting off a heck of a lot more than I can chew.  I find myself using reasoning like, "I have no real excuse not to.  I don't have a husband.  Or a family of my own."  But recently, I've gone days without talking to people that I love.  I've only managed to do one load of laundry.  In an effort to be all things to all people, I have managed to completely not take care of myself.  Sometimes, saying no just makes me feel like I am being selfish.  But is that such a bad thing to be every once in a while?