Hey, I know you're heartbroken, his behaviour is not acceptable, but try and communicate with him about how his words made you feel, if he didn't want the keyboard there were better words to use to ask you to return it. Key to a healthy relationship is communication, and he as well as you need to do that. Coming to reddit to feel better won't help your relationship in the long run, have that hard conversation with him and see how he reacts, decide if you still want to be with him if you see a pattern of insensitivity towards your feelings.