Under most circumstances, no. Unless the leave you something in a will, or unless you come from a state that recognizes common law marriage and were living in a common law marriage in that state, Florida does not normally recognize common law marriage. The major exception to this is if you have been in a common law marriage in Florida continuously since 1968, when Florida changed the law. While there are some theories for recovering some money or property if someone who you are not married to dies, these are difficult to pursue in court and there is no guarantee that you will be able to recover anything. If you have questions about your rights you should consult a Florida attorney to explore your options.