Advice?

Hey all! There’s this guy who I’ve been hanging out with and he’s very sweet and we’ve gone on a few dates. Guy says he wants something serious with me and it’s what I want as well. But I just found out that that he recently got dumped because he cheated on his girlfriend again of 8 years. He didn’t tell me this, I found out from a mutual friend that we have🥴. Should I still continue seeing this guy? Or would this be just a red flag?