Should I take him back?

me and my boyfriend got into an arguemeng and this bitch said "that's why I fucked your best friend." Now, I have PROOF that he has never fucked my best friend. She is still a virgin, still scared to put tampons in and everything. And I know her well enough to know she wouldn't do that. I talked to her and she cleared it up quick.
Should i take him back? He said he just wanted to temporarily hurt me like I hurt him. He didn't do it, but to even insinuate that he WOULD do it pisses me off. How would he feel if I told him I would fuck his dad or brother just because we got into an argument. I'm considering g taking him back but I'm still majorly upset at that.
Should I take him back?
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