Coming out as bi

Basically, I have been considering myself straight but curious for a while now but have recently have kind of realised that I may be in denial and I probably bisexual. Watching Tom Daley come out as bi publicly a couple of days reassured me that I might be able to do it, but although I'm pretty sure everyone i know will be supportive, I am worried people may treat me differently subconsciously :/
i also worry that girls will be put off by this. Ultimately I know I would like a wife and family, should I just keep quite and hide it? Im just so confused and scared by it all to be honest!
any advice or experiences would be really helpful thanks:)