What should I do?

Okay so I've been talking to a mutual guy friend who I met a while ago at the end of February at a party. We have been talking ever since, hung out several occasions and may have hooked up a couple times. I really like him we get along and we have a lot in common. Recently I told my other friend about it and she said to not talk to him because a few years ago, he slept with my other friend in the friend group (just found this out). I feel terrible and guilty but at the same time still like him and want to hang out. I'm not sure what to do and this gives me anxiety because I don't want to make anyone mad but I dont want to stop talking to him. Please. Help. Me.
What should I do?
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