This happened to me when I was 18. I fell for this guy who worked in my town but lived about an hour away. He told me he had a young son, but he and the mom had recently divorced. I found out fairly soon after that he was not even in the process of divorce, or even separation. I was livid. (This was before it was easy to find things out via the internet. Also I was very naïve, and ignored a lot of my instincts.)