You are kind, you are compassionate, you are always willing to take a long diversion from your path if it will help someone you care about. These are all qualities to be proud of. You are not, though, some kind of mythological martyr or psychological superhuman. There's a point past which you should not go. And you always know when you have reached it. Instead of saying 'OK, that's enough', though, you tend to feel bad about drawing the line. Don't do that this week. Do your best and when you can do no more, do no more.