Sure, there's such a thing as love, Thisworld, and you'll find it one day. What you have now is not love and probably hasn't been for a long time. In an episode, a depressed person isn't able to feel real love--oh, she may have moments of exhiliration and think that she's in love, but it doesn't last. The moods are so unstable. And the judgment is clouded. It's often referred to as a "fog" one is in during an episode of depression.
You're going to have to take care of yourself the way you took care of her until the pain assuages. Even then, you owe yourself a better and healthier life which you will find if you give yourself a chance and lean on a Higher Power for guidance until you are assured that you are being loved for just who you are and that the higher form of love will be an enduring and lasting one to guide you through all the trauma of trying to live with someone who is mentally ill.
She has a lot of "growing up" to do, Thisworld, and only she can do it. Nobody else can do it for her.