If the affair that your spouse is having progresses to a full emotional affair, they may start to disengage from you. As they start to think about their potential new life with their secret lover, they may not put much effort towards your relationship. If you find that they like to be alone all the time, don’t want to talk with you, pick up hobbies that you aren’t invited to join, or always want to be away from the home, they may be planning to leave the relationship.