Re: How Do I get Away from an NPD
You may think your daughter isn't being hurt by being exposed to him but nothing can be further from the truth. She knows that you have a relationship that is more than friendship.
Yet, clearly she has witnessed his behaviors. Arguing with an 11-year old over such ridiculous things isn't normal. In fact, from what you've written, in this case, it is emotionally abusive. You yourself have pointed out how he always has to be right---even with an 11-year old!
Since your daughter knows that you and the NPD are more than friends, you can expect that when she is old enough to date, she will be attracted to the same type of man. After all, that's what she's learned from watching her mother.
What your daughter needs from you right now is a stable home environment. Having this man in and out of your life isn't giving her any stability.
She also needs you to set a better example. That's why I said you shouldn't date again until you've worked through your issues. Have you gotten in touch with Codependents Anonymous? If not, have you made arrangements to get counseling?
You've made a positive first step by getting your key back and telling him why you don't want him around. Now, take it to the next level and get some help.
Also, read SoulfulSurvivor's post again, and take it to heart. There is a lot of great advice in that post!
Please get going, if you haven't yet---not only for your sake but for your daughter's sake, too. You don't want her getting attracted to an NPD, do you?