Codependency might mean slightly different things to different people, but essentially it's when one person is sacrificing more for their relationship than the other.

In romantic relationships, it's when one partner requires excessive attention and psychological support, and often this is partnered with them having an illness or an addiction which makes them even more dependent.

A codependent couple will not be good for each other. Usually, they will get together because one or both of them has a dysfunctional personality, and more often than not they will make each other worse.

For example, people involved with narcissists will find themselves giving and giving, but it's never enough. Their partner will keep moving the goal posts and making unrealistic demands until the victim is completely burned out.

It's important to remember that in a healthy relationship, it's normal to depend on your partner for comfort and support. But there's a balance between each partner's ability to be independent and their ability to enjoy mutual help, and if that balance is off, that's when things get messy.

We asked 8 relationship experts for the warning signs you could be in a codependent relationship. Here's what they said: