My sister is one of those women who never wants to marry or have a long term boyfriend. Nothing wrong with that, I know a lot of women are like that these days. She defines herself as a career woman, which again, is fine, but she has dated in the past and they've all broken her heart, really badly.

So I think she's a bit scared of being hurt so that is why she no longer tries.

But please help me understand the reasoning behind women like my sister. Even at my work place, there are many women who are single in their 40s and don't ever want to marry , have kids, or a companion. They do a lot of traveling around the world with their other GFs, and just concentrate on career. But sometimes it makes me think if they've been also heart broken in the past and have given up or if there is some other reason for this lifestyle.

Please help me understand these type of people?