I say it to my husband every time we talk on the phone, when he leaves for work, he says it back, too ... I only said it to my mom when I was leaving or going out, something like that.
I dunno. I wasn't raised that way. My parents were totally different from my husband's family, mine are formal and private his were laid back and loud. I'm really close w/ my parents, I see them almost every day but we don't say I love you or hug or anything like that.

