What does this mean? My boyfriend and I were driving home from his parents house. We drove by is ex's rode..

he turns around in his seat to look down her road. We have been together for 8 months and he kept in contact with her. I read his texts back in november of him iviting her out for drinks. They were together for maybe 4 years and broke up less then a year before we got together. Is this just natural curiousity that he turned around to look down her road or is this a tell tale sign that I need to abandon ship? You know us girls, we read too much into things.