Do i have a right to be mad ?

So me and my boyfriend broke up( but we were gonna stay friends) and like not even 10 min after we broke up i see the girl he cheated on me with posting all over his Facebook wall so i started flipping out. Then he cursed me out saying nasty **** and i don't have a right to be mad also he stole my iPod and idk how to get it back. So do i have a right to be mad and how can i get my iPod back ?