Single Parenting Support Group
Today being raised by a single parent is not uncommon. About three in ten children live in a single parent home. The most common type of single parent home is one with only a mother. However, single father homes are the fastest growing type of family situation; 60% growth in the last ten years alone.
i would suggest getting a lawyer and getting full custody documentation so that should your ex actually decide to set up and be a dad should he not return him on time ect you can have him charged with custodial interference. the police will not do anything unless you have the court documentation. i would tell your ex either he steps up and be a dad to yor son or sign his rights over to you and get out for good.