text: If your daughter is a minor, and lives with you, try to impose restrictions to her outings. Don't argue with her, or stop being loving with her, just factually tell her she's not going out later than x, or more than x times a week. \nDon't turn this into a personal problem with her: your problem is with him. Of course, she will be mad at you for not accepting her boyfriend of choice and being happy for her; but she will soon get that (because of all the other things you do for her) that you just want her welfare, even if she continues dating him for a while. \nIt may seem hard, but remember that it won't last forever. The best you can do is probably to watch her welfare and make sure that she doesn't get into trouble. \nLet her know, very subtly, of course, that if she decided to date someone else, she could be out longer, and do funner things. Set her up: if there is any of your friend's sons who you would like as a boyfriend for her, plan for the two families to go out, and allow her to stay up later or do something fun on that occasion. She will associate things together. \nI'm not a parent, so unfortunately I can't give you first hand advice on this matter. I have had boyfriends my parents haven't liked, and they have made me realize that they weren't right for me by doing these things, though. \nGood luck.