“Whether we give away too much or too little of ourselves, our vitality dwindles.” ~Sue Patton Thoele   Black Hole Relationships (Parts of this essay were adapted from Writing Home)  A full-time mother of three once told me she looked forward all year to summer break and hated to see it end. Was she nuts? Did she really enjoy refereeing troops of rowdy kids in her basement and making dozens of grape jelly sandwiches on short order?   “I love summer because I get a reprieve from the back-stabbing at school events and Mothers’ League meetings,” the young mom insisted. “I don’t have to deal with the woman who doesn’t like…