S.,
I read the other postings, as well as your update to the situation. One of the other mom's stated that fl doesn't allow a parent to abandon the child becuase the state doesn't want to support the child. That is true. The state doesn't want to make it easy for parents to abandon their child. (I work in child protective services). Florida wants parents to be responsible for their children. Which they should be. Next, if you are not going to divorce him right away, he still should be paying child support. I don't care what you do, the cost of living he in Brevard County is rising. I am no a single parent, but I am the only one bringing an income into the household and it is super difficult. If you do divorce him, make him pay child support. Then, in the future if you meet a man who would adopt your son, go after his rights so someone who wants to be a dad can.
But in the mean time, I strongly encourage you to make him be a "grown-up" and be responsible for HIS child. Besides, If you have ever apply for KIDCare or Medicaid for your son, the state makes you give them the info on Dad and they enforce child support.
Hope this gives you another perspective.
I.