About two years ago, my husband an I separated for around a year and he got into a relationship with a younger woman. We decided to give our marriage another shot when our son became unwell and needed surgery. We have been back together frown around 18 months but I recently found out do the past 6 months he has been regularly searching for his girl he got into a relationship with regularly on instagram- multiple times a days I know he is not seeing her behind my back as we have now moved about two hours away but I am concerned he is still in love with her? Should I be worried?