If your Kid tells you he wants to listen to Rock Music and have a BF/GF but will keep Shabbos and Kosher will you disown him or give them mussar and perhaps drive them away or would you still love them and let them make those choices and be happy they are shomer shabbos.
Unfortunately having a BF/GF is practially asking for Issurei Kares. If my child came home with one, I would probably tell them they have to get engaged on the spot and married in 6 weeks or less.