I think staying on the high road is admirable. I just think there's a fundamental difference between expressing your personality and having someone accuse you of being flirtatious, and being actively flirtatious with intent to cheat or make your partner jealous. And I don't think it's as cut-and-dried as you want to make it in this thread.
If you think that you have been flirtatious in the past and that you've inadvertently hurt some people or led them on, then I think it's cool for you to realize that about yourself and make an effort to change your stripes. But I think you have to keep in mind that not everyone will see things the same way--even people that you CAN trust, and who ARE reasonable and moral. It seems strange to me that you're determined to make everyone come to the same conclusion, when there are so many variables. One being that sometimes, no matter what you do to avoid it, some people will misread your signals, because they are not familiar with what your flirting mode looks like. You can avoid all possible ambiguity by completely toning down your personality and changing your style of interaction, going out of your way to avoid women altogether, etc., but how enjoyable is that going to be for you, in the long run?
Obviously, I'm not saying to not be considerate of your SO--to me, as long as you're thinking about those ramifications, and how she might feel, you're on the right track. You could probably even cut yourself some slack.