Guys, How do I move pass girl send me screenshots of my boyfriend cheating?

So this girl sent me screenshots of months and months conversation between her and my boyfriend. Well I saw the SAME conversations and call history on his phone. When I asked him about it , he just told me he doesn't know anything about it. He doesn't know how they got on his phone. He thinks it weird though. I'm like okay so where do we go from here? should I just take him at his word?

Guys, How do I move pass girl send me screenshots of my boyfriend cheating?
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