Ex told me to move on, and then got upset when I told him I was?

We were together for 2 years, but broke up two days ago. We've been in contact via texting but haven't seen each other. Tomorrow was supposed to be our 2 year anniversary, so I asked him if I was supposed to care. He said "I'm sorry, I never meant to hurt you". Obviously I got upset and things got heated. Finally he sent me a message saying "You need to find a rebound. I'm trying to move on, and you're not letting me". I said (and it was true) "I have a rebound, he's been texting me for the last two days". At that he got FURIOUS. Called me a Bi*** and that it was a real Cu** thing for me to tell him that.

I'm confused, he just said that he wanted me to find a rebound so why did he get so upset when I told him I had one?
Ex told me to move on, and then got upset when I told him I was?
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