With this video, we learn how to deal with a girlfriend who tends to tell white lies. First, don't set an ultimatum with the girl, this will end up in a verbal fight and can ruin the relationship. You need to start to create a new relationship with your girlfriend so she feels more comfortable with you. You need to tell her that if she keeps lying to you then it can cause you guys to end your relationship. The average person tells 26 lies a day, even if they are just white lies. Try working with her and building the trust in your relationship.