I agree that GAL is about not being needy, dependent, obsessed with the WAS. It is about being emotionally stable on your own and confident of your success in life w/ or w/o WAS. Going out may help, or it may not. Certainly, you can GAL while not going out partying or playing bridge, lol. It simply requires making plans, having goals, living a life not contingent on the WAS for happiness.
