Hi and welcome to A2K.
I'm mainly bumping your topic (I'm a str8 woman, m'self, so I don't have your experiences), but I would also suggest considering the individuals in your family. I'm sure there's no reason to come out to everyone at once. So thinking of it instead that way, as a multi-step process, maybe start small, with someone who you believe is most likely to be sympathetic. Let's say that's your sister (I don't even know if you have a sister, but stay with me, okay?). Maybe the best approach is - I met somebody special. I'm really happy, and I'm in love.
And then she'll inevitably ask you what that person's name is, and you tell her. And you enlist her help (assuming she's sympathetic) in telling others, and continually widen the circle of people who know.
But I will ask some of the guys to stop by as they know better than I do.
And yay that you're happy and in love. So many people aren't. Be happy.