 Five signs of a toxic relationship. Controlling behavior. If your partner is trying to control your thoughts, your emotions, your actions, your jobs, whatever. Emotional abuse. If your partner belittles insults, name calls you or gaslights you. Manipulation. If your partner is manipulating you into doing things that you don't wanna do. Lack of trust. If you feel like no matter what you do or your partner does, for some reason you feel a constant lack of trust, that is a sign of a toxic relationship. And the biggest one, negative impact on your mental health. If your relationship is causing you stress, anxiety, depression, or anything along those lines, you are most likely in a toxic relationship.