I haven't read all the replies, but here's my advice:
Stop thinking of your rating as something you "worked hard for" and can't bear to lose. Instead, think of it purely as a tool used to match you with other players of around your level, to ensure you get to play really interesting, enjoyable games, instead of getting crushed or just crushing someone yourself. You'll probably then be able to learn heaps from analysing those games (especially the losses where you lose rating), and paradoxically your rating will start rising as you learn these important lessons.
Better safe than sorry I suppose