You may have been having some really good conversations with someone that you met on an online dating site only to later discover that there is a police report with their name on it.
However, conversations have been going so well with your match that you may have felt the need to do it before you allowed yourself to become more emotionally invested in them.
You may have reached a point where you are just not getting the kind of responses that you want or you may have gotten good responses that simply went nowhere.
All of this can become very frustrating after a while.