I realize this is kind of a moot point since she's moving out imminently .. but I'm going to give you the same advice I gave Thinker. If it's killing you to wander around in the candy store while you're forbidden to eat any candy, then stop. Stop sleeping with her. Ask that she cover up a bit around the house, or at least you avoid situations where you will see her naked to the best of your ability. Nobody else is going to take care of you in this area; you have to do it.
In other words, assert yourself and set boundaries. Stop being afraid you'll say/do things that might 'push her away'.
Believe me, she WANTS you to be assertive, confident and set boundaries with her. She wants to see a real man in her life.
