I want to throw a bomb at my ex!?

First off he broke up with me. It was okay when we first broke up but now its spiraling out of control. At first we would talk and show we still cared about each other but now its horrible. We say mean things to each other and when we actually do start a conversation we end up with more hate at the end. I still love him and I don't mean anything I say.....I just don't understand why he's being the jerk. I never cheated, lied, or stole from him. All I did was give him my love. He could just say nothing at all and ifnore me the way I ignore him but he always, always, always has to start something. He's bitter for some strange reason. Anyone been throgh this?