And I disagree with your second statement.
Caring about what they're thinking or doing after the relationship is over is the fast track to obsession and stalking. 
That's one problem with certain western countries. They and society always say "stalking this, obssession that" and they whine too much about if they are being stalked and obssessed about. They should get over themselves. I would just tell those people as a comeback: "don't flatter yourself, I'm not that desperate". Also be careful who you choose and get someone who is more about love and is sensitive and not selfish with an attitude or superficial, like people tend to be on average around here. Don't pick a girl who cares about what car you drive, your wallet, possessions, or just liking you for your looks, etc. That isn't love. That is pure selfishness. Choose someone who loves you for you and for your similarities, character; things like intelligence and patience; and kindness. Sure looks are good and matter somewhat to me, but she doesn't have to look the best if she has compatibility and qualities like being faithful and honest. So-so looks are fine if she has compatibility and personality.
@Liberator: Choose someone with your views and you will be ok, even if it means you must meet someone from another part of the world. Don't look in a bar. The most important thing in love and relationships is having stuff in common when it comes to morals, lifestyle, and ways of thinking. Otherwise it is doomed from the start.
@iamzack: No, not all woman are exactly alike at all. Sure they share similarities since they are all women, but differences as well. Just like men and women share similarities since they are both humans, but also differences. Just like we share similarities to other animals, but even more differences. Always some similarities and differences but the further something is from something else physically and mentally, the more differences it has.