involved in a relationship in which one person helps to cause another person's alcohol problem, drug addiction, etc. because they have a strong emotional need themselves

A lot of codependent people will put up with their friends or lovers doing drugs. 许多身处依赖关系中的人会容忍他们的朋友或爱人吸毒。

It is never easy to disengage from a codependent relationship. 从依赖关系中脱离出来绝非易事。