Just look for a man who does.
Most Helpful Girl
It could be a number of things; she might believe that she could be the one to change him, because he is otherwise perfect to her, or she may be in love with the sort of chase of trying to pin a guy down. It isn't always as easy as dropping everything and finding somebody. Establishing a real connection with someone is not only rare, but it takes time, so she could also feel unrelenting because she has invested so much time into this person already.
Personally I don't pursue dudes who don't commit, but that's my theory.1
Most Helpful Guy
Because chances are that man is handsome and she thinks she can "fix" him or make him "change" just for her - all of it stemming from this sense of being a princess.0