I rarely just call people up and babble at them randomly about my life.
Don't you have a special girlfriend or girlfriends that you call a lot, meet for lunch, go shopping with, and just generally chat about stuff that's going on in your life? Maybe that function is fulfilled by your sister(s)? Have you told your sister(s) about him, including Who He Is?
You're not one of those women who can't be friends with other women, are you?
