you should not told your daughter to leave his boyfren

Tell her you overreacted, but that you are concerned about her relationship. Let her know she will always have a safe home with you. Don't forget that your love for her is stronger than her defiance. Keep her in your prayers.

Of course, I can't give you an advice except telling you that you'd be wiser now: you should show her that you give her a chance to be a self-sufficient girl. She must see your love through your confidence & credence.
You know, kids sometimes become adults and adults were kids.