Make new friends, but keep the old . . . The friendship philosophy of the Girl Scouts might work on the playground, but isn't always the case when a baby enters the picture. When one friend enters the next stage of her life, others may feel left behind. On last night's episode of How I Met Your Mother, Robin began withdrawing from a trying to conceive Lily after growing apart from her childhood best friend (and "Space Teens" costar!) when the latter became a mother. Did your pre-baby friendships remain the same after your lil one arrived?