check out some coming out threads. You can find them by doing a tag search. It's really a personal choice. You know your parents better than anyone... I am 41 and don't tell my parents shit any more. It isn't their business, I am a grown woman and although they raised me, I am WAY past honouring their idea that they are entitled to any info about me. That being said, we get along great with what we have... like anyone else in life, some people don't have to know everything. It depends on the level of relationship you want to have with them. (I have much more further detail in my blog. My coming out was the shits... I have good reason to be discrete
and I'm totally happy with that).