We're in a similar situation, in that we now have two adult cockerels, two just coming of age, and another seven which are just off heat. It's just my luck really that out of twelve chicks hatched this year, nine have turned out to be boys!
I suspect you'll have trouble later on if you decide to keep them all though. Our twelve girls hardly get a moments peace just now, with four boys in the flock. However, one of the young ones is going to be Sunday lunch, and the other is going to a colleague, so we'll be back to just two by next week (and I'm sure the Girls will all breathe a sigh of relief!!).
I used to think that in commercial set-ups, the girls were kept for eggs, and the boys for meat. I realise now of course that this is totally wrong, and that the boys are killed immediately. So, although I won't particularly enjoy killing the excess cockerels, at least ours have had a decent six months or so of free-ranging first, rather than being bumped off as day olds.