I loved the story of the girl who was being kind to a stranger. Restores my faith in humanity when I hear nice things like that.
As for the hook up incident, its good to want to change impulsive behaviors we don't like about ourselves, but beating yourself up for it will only make you feel worse. What if a friend told you that same story- would you berate and judge them as harshly as you are to yourself. You should be as kind to yourself as you would be to your best friend.