Throughout life you here about some women who can never seem to go without a boyfriend because they don't feel whole or like themselves without one. The reason they may feel this way is because they think that a man defines who they are and validates their being. What they don't understand is that no one has to validate who you are but you.
Throughout life a woman has to take the time to find out who she is as a person, her likes and dislikes, figuring out her future, appreciating her inner beauty as well as her outer beauty amongst other things. If these simple things are not accomplished because you can't take the time out from always having a man on your arm then you are missing out on becoming your own person. Simply doing these things will help a woman to know who she is as a person and this in turn will build confidence in knowing what she wants out of life. These aspects are also very beneficial to a relationship as it will cause less stress on your man. Having your significant other trying to help you figure or validate who you are as a person takes away from the beneficial factor of a relationship which is learning and growing together.
All in all there is nothing wrong with having a boyfriend but only for the right reasons. If you are simply with someone because they distract you from finding out who you are then maybe it's time to take a step back.
Finding out who you are as a person is one of the joyous parts of life.