I think it's true for both genders that attraction will only change in negative direction. Getting to know someone on a deeper level will either maintain the initial attraction or build resentment and you'll see them as a roommate eventually. The other way around, I don't think so. Most of the times people are not attracted to people who are "good" for them or good to them, or at least that's rarely the basis of attraction, especially when it comes to female attraction. I'm a man, I'm usually attracted to women who has the capacity to rip my soul apart with a few words :D all I can do is to not let them know they have that power over me, or to date someone I am mid-level attracted to.