Codependent is a word used to describe a relationship where one person excessively relies on the other, and both people become emotionally dependent on each other. Full definition
Pedram calls them Time Vampires and says we often engage in codependent relationships with them. (theeverygirl.com)
People in codependent relationships often tell small lies to one another to keep each other happy. (perspectivesoftroy.com)
The best way to break free of codependent behavior is to have a support system outside of your relationship, whether that's friends, family or a counselor. (powerofpositivity.com)