Did I cause my husband's depression?

My husband and I are separated and on the fast track to divorcing. He is really depressed, and it's not clear whether his depression has clouded his judgment and his ability to love me, or whether his unhappiness with our marriage and lack of love for me MADE him depressed. He seems to think the latter. He emotionally withdrew and kind of just watches TV, and he told me to consider the reasons WHY he chooses to watch TV over talk/hang out with me. That really hurt me, as he was implying that it was my fault, but maybe he's right? He was always more of a homebody than I was, but it recently over the course of the past year, got SO MUCH WORSE. Any insights?

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