I lucked out in this respect - but I know we're in the lucky minority.
I finally brought up my feelings about the "truth" to my parents fully expecting to have to drop out of college, get a job, and move out with my things within the month...
Oh it wasn't easy - there was screaming, yelling, accusations, hurt feelings, crying...oh the crying...all around the table, and there were even a few visits with elders. Eventually my parents and I have come to an understanding about things. More of a "don't ask don't tell". I don't try to change their minds - they don't try to change mine. They still talk about congregation things - or what they are studying - but I look at this more of conversation about what's going on in their lives than preaching at me. I know they still hold out a hope that I will come back. I'm ok with that - I know the truth now.
I think when you have reasonable people who are willing to work things - sometimes there can be peace. Sadly - that's not the case with most - and this religion is never really about being reasonable...