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"Надолго" is fine, "удалил" is not. "Я отослал его надолго", or maybe "Я выгнал/изгнал его надолго" -- it all depends on the context.

Much better :).

Wrong. "Я долго жил один" or "Я долго прожил один".



If you wanted to say "I had had my share of living alone before I met my wife", it is sort of passable. But barely. What did you actually...