It doesn't mean keep on living like bachelors, and it doesn't mean neglect your family. Paul says elsewhere that those who neglect their family are worse than unbelievers. What he means is that even our wife, husband, family, is not the principal reason for our existence. That is, the only eternal marriage is the marriage of Jesus to the Church. All other marriages are for this life only.
Some people see marriage as the only end to work towards in life.
The be all and end all of existence. No, says Paul, it isn't. There is a higher calling, the calling of faith in Christ, the calling of pleasing him. It is more important to please Christ even than it is to please your spouse. That could describe either those who are content in being single, or perhaps those who are rejoicing at their upcoming wedding.