How do I move on what's my next step?

My husband left, we had a really rough few months, our son has been acting up in school and yesterday it came to a head he broke his hand and walked out of a moving car, and fell. He's done, because all of this is my fault, I make him act this way. This morning I was crying but now i feel indifferent, i'm not as upset anymore. This is the second time he's taken all his things and left to his aunts house. How do you move on? for real?
How do I move on what's my next step?
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