The day will come when a boy comes along and steals the heart of daddy's little girl. When this happens, dad has to accept that he's no longer the only prince in her kingdom, and he has to reach a compromise so she can break away from him without feeling guilty.
The same applies to the day she leaves home. It's an important stage in the father-daughter relationship and she needs to understand that these changes aren't easy for her father to accept. At the same time, he shouldn't interfere in her private life. It's time for her to spread her wings, and although she's fleeing the nest, she still knows he'll always be there for her. It's the start of a new relationship between the two of them.