Those that haven't been loved correctly

Do you notice that they cant accept real, genuine love? Its like they need the hard love. To prove themselves for acceptance. If they cross paths with someone that would give them the world, they run from it and run toward someone that mistreats them.
Its true. I remember when I was younger, before the trauma of loving someone with everything in me, I use to run from the nice guys.
After a couple of decades loving and giving to a man that was selfish, I am now attracted to the good men and repulsed by the selfish and toxic ones. What a concept