So right- you are NOT SO RIGHT at all with all your questionning.
While I also think its not right to hang around with a boy for years, I don’t judge anyone who does.
To put it simply, it really isn’t your business.
And if any of them chose not to follow Halacha, do you really think they will listen to your little mussar here, let alone admit their wrongs?
I think I would be very offended if I were them…