I have only told one person (my best friend) that i am gay, i want to tell my parents, but dont know how to go about it. What is conversation starter/way to tell them?
Well, first you've gotta make sure that they are going to be accepting of something like this. If they're not going to be supportive, you may want to consider waiting until you're out on your own and not being supported by your parents.
As far as getting a conversation started, just sit them downafter dinner or something and just tell them like it is. No need to have some dramatic coming out. Try reading the Coming Out page on Oasis.
Some people's kids...I tell ya!