Refusing to Creep with a Married Man

I used to always believe that I wanted one day to be married but the more and more I think about it I'm so glad I am a Ms. and not a Mrs.  I know having a husband around could lighten my load and ease some of the financial burden that I am sure to face as a single parent, but with all the potential cheating out there, why bother.  Every time I think of marriage and the heartache I had to face with my son's father, I count my blessings and I thank God for not putting any more on me that I could bear.  Very recently, I received an inbox message on Facebook from an old schoolmate, asking me "where was I now located."  I thought this was very strange, for more than one reason.  First, it had been over twenty years since we had graduated from high school.  I was never that friendly with him, but its social media so you tend to accept people that you grew up with or went to school with at some point in life.  What was also so strange about this message, it was an inbox, so no one saw the message but me and it seemed to come out the blue.  We had had no prior conversations, private or public, so for him to ask me where I am located at now, yes was indeed strange.  Every time I looked up I was getting different inbox messages from him.  Each message was getting stranger and stranger and I didn't know at first at least I didn't want to believe that this guy was trying to come on to me.  I admit, since I broke up with my son's father some years ago, dating had been the last thing on my mind.  His inbox messages were messages that were asking for up-to-date pictures of myself  and messages that wanted to know where I was residing.  I was flabbergasted because we had graduated 24 years ago, and we had a ten year high school reunion and I really don't remember if he was in attendance.  I can honestly say I was talking out loud to myself that day.  "Where is this coming from? Who is he talking to?"  Clearly, I thought he couldn't be talking to me I haven't seen him in years.  As the day went on the messages kept coming, and they seemed to be a little too personal.