If you have a friend who cheats on their partner, does that make them less trustworthy in your eyes? Would you see it as a red flag about their character? Also, if you knew about their infidelity, would you confront them or stay out of it since it doesn’t directly involve you?
That's a huge red flag. Infidelity is a big no no it means they are not trustworthy. Confront them if they are your best buddies or if they are just an acquaintance freind then leave them. You deserve better than those people reply