Well, first of all, have no shame. Just because you like something, dosen't mean that you suck and a girl and bla blah blah. If they don't accept that, point out something they like and say, hey 'stuff'.
But don't over push it, and try and get your friends to become bronies or watch MLP, each to their own.
Also, confide with your most trusted person first.
ADVICE OVER.