I, too, am finding myself lonely after a break up, even though I have plenty of friends, and belong to many groups, and am extremely busy. It hurts when we lose a love relationship. Finding friends who do not know him sounds like a good idea. Many break ups involve a 'cut off-' where they do not communicate at all. Many don't have cut offs, but some do, unfortuneately. Build yourself up, this time is about you and your self awareness, self confidence, self knowledge. You will make it through, time will heal......