Oh sobernow, big hugs, I'm so sorry.
Something that may or may not help: I've been ditched, repeatedly, at least once by a man who I loved to distraction. I went under for a bit, once or twice really quite badly (done the drink and despair and the out-patient appointments in the bin, the lot)...and then I got my life back. You didn't ruin his life. It sounds as if he and other people (how kind, not) found your behaviour a convenient thing to blame for what HE did with his life.
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