Should I keep ignoring him?

My husband and I are separated, he doesn't want anything with me, long story. Anyway at first we were not talking at all but then it changed and everything was good between us (still separated) we would still text each other. But this whole situation hurts me so I decieded to stop texting him back, he send me a few more messages but then he realized I'm not answering back, and his last message was "so your ignoring me" what should I tell him? Should I explain it hurst? Although I'm sure he already knows it hurst, but why is he still asking? What does he want from me I don't understand, what should i do?
Should I keep ignoring him?
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