I Hate My Twin Brother?

I have been going through this for years now with my twin brother. He always tries to act smart and think he is right all the freaking time! I insult him practically every time we are in a fight, he has to start crying and acting like a baby. Jumping around, stomping and screaming, I mean come on now he is 15! The other day, when he was crying and acting like a baby, he decides to throw water on me and say I don’t care and he tried to throw his backpack and other things at me. The worse thing I do is keep talking and insult him but when it comes me he tries to call me emotional. The stupidest thing that happened was when I wanted to sleep on my own bed in the living room (He has his own bed) He kept telling me to go upstairs because he won’t turn off the television for me to sleep but the fact is he is being selfish. This shows me that he is too selfish to even care about one night without the television on. We both also dance and I am more experienced but whenever I try to help him, he gets mad at me and says I try to act smart! I very nicely get him a critique to help him out but he gets all mad and wants to say I’m mean. Seriously, what can I do? This has been going on for too long and he keeps being violent in most fights, I don’t even hit back to do anything but say things.