How old are you? Grey hair in fact isn't so bad as it seems, it can appear even in a very young age (I know such people) Don't be too frustrated about this because its appearing doesn't mean that it's the end of your life...
Also you can always cover it up, using the different hair dyers, there are so many ideas for them, like here http://machohairstyles.com/incredibl...ideas-for-men/ for example And even bright colours can look cool and fit you in the adult age, I saw many examples of it!
And as I know the silver/grey colour became very fashionable during the last several years, so having it can be an extra plus for your style