Insecurities in relationships stem from problems and issues between you and your partner. These grow with time, if not talked about or resolved. One of the biggest insecurities people have in their relationship is whether their partner still thinks or talks about their ex or not. When an ex enters the picture, relationship dynamics tend to get lopsided. Hence, to help you figure out, here are some ways in which you can reassure your partner if they keep worrying about your ex.