I was outed to my parents so needless to say, it was a little bit stressful. But over time, they've become OK with things. What does happen when you come out, despite the initial pain of it, is totally liberating. I think sometimes the pain is due to the need to conform to what others think we should be, being ripped away.
Think of it this way - we as gay guys are lucky, in that we have the option to come out and then become who we want to be, uniquely. What a great opportunity.
Though it may not seem like it now, an amazing life is right in front of you. Be the person you truly want to be, and don't hold back. There are a lot of wonderful, supportive people on this site and in general. None of us start out confident in this game, but through being supportive and understanding - we become that.
You have every reason to be optimistic, excited and yes, even a little scared. It's all OK. :-)
You're going to be great. Congratulations to you for coming out and daring to be YOU!