My 11 month old black labrador is driving me crazy!?

He sounds like a typical "teenage" hooligan to me. Castration will help a bit and if you are not going to breed from him (and I hope you are not) it will give him a much more peaceful life as well as a healthier one. It really would be the best answer to get him some professional training, hes running rings around you. you both need help. On the bright side he sounds basically like a lovely dog!