Sac
I so don’t agree with you on this one!
A- It is a life choice. There’s a chance he’s her bashert and the fact that her friend dated him shouldn’t stop the possibility from them working out.
B- I find that to be a very non-Jewish concept. This isn’t like stealing someone’s boyfriend. There’s a chance for them to get married.
I probably would say something before engagement but wouldn’t not date him because of this reason.