***Don’t throw hate if this has been asked already. i’m new here

I got a question for the bros/besties Why the hell did none of Dale’s friends inform him that Nancy was cheating on him? What if Dale had found out? Would everyone continue to lie and say they didn’t know or would they come out with the truth that knew this whole time? Wouldn’t yall wanna tell your childhood best friend what was going on? As someone who grew up having childhood best friends, I can say for sure either of us would come forward with the truth as soon as either of us had found out. On top of that, I know myself and my friends would be upset to hear everyone knew but never said anything. Idk, I just think it’s strange and sort of upsetting that no one told poor Dale.