Good on your decision to not be the financial blanket for your W. Part of the path in my opinion is showing the other party how difficult life can be on one income.
I would like to hear more stories of you and this other girl. I am in somewhat of a similar situation although I do not intend for anything serious to occur.
"Don't chase people. Be yourself, do your own thing, and work hard. The right people - the ones who really belong in your life - will come to you. And stay." ~ Will Smith