Dependent people have a need for another person that is so strong they don't feel whole without someone. That emotional dysfunction feeds on the finding and keeping of a person with a similar dysfunction. However, an independent person still has a need to be with someone, but is fully capable of living by themselves. The answer is really one of relationship concepts, not how dependent the disabled person is on another. Being interdependent is a good thing.
Interdependency is the best of both worlds.
They can function in society just fine by themselves. But each is fully aware how much richer their lives can be when shared with someone who values them. Self-respect and empathy are essential to a successful relationship. So is independence. But those definitions do little to ease the plight of the disabled culture when it comes to romance.