When I came out as lesbian I was very fortunate that my mum is a really accepting person but there was some people in my family that weren't as accepting. Also I have some friends that have a massively issue with it and the best advice I can really give is, if you are really ready to come out, then you should come out. But I don't think you should put pressure on yourself, like who you are attracted too is no ones business but your own but I know that its nice to be able to discuss it with friends and family. My best friend of nine years was one of the ones that took it badly and she said she didn't want to share a bed with me anymore or get dressed in front of me anymore and that hurt. she had no issue doing it before I came out and I just kept reassuring her that in all the time she knew me, all the time she got undressed in front of me, I was still gay she just didn't know. You are still you, regardless of what gender you are attracted too. She came round eventually and for some people it takes a while but the people who love you for you will come around eventually.
Those who mind don't matter, those who matter don't mind.