fighting my brother

My brother is so stupid,he always picks on me and makes fun of my friend. He calls me heaps of mean names, he always picks on me so much he goes all psycho at me for no reason! Most of the time he just comes up to me randomly and takes his anger out on me and when ever I tell on him and say yeah and agree with Mum or Dad he just punches me and I always end up with bruises. A few times I've wished he wasn't my brother!!!!!!!