What should I do about this?

So I pulled a background report on my boyfriend and it turns out he had some pretty extensive criminal history up until 2012. Including selling drugs!! He told me that he used to be an alcoholic and he has been sober for about 4-5 years now he also is going to AA meetings he told me he never did drugs but he didn't tell me he was selling them.

What should I do about this?
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