Fairytale.

Why are we all convinced that love is what we all really need? Maybe because there's so much truth to that statement, it's disgusting. In all reality, we are emotional beings that need love in order to survive, how love is defined, however, is all in the eyes of the beholder.
When I was little, I had a couple of favorite princess movies and fairytales. Beauty and the Beast was always one of my favorites, because the Beast seemed to be custom made to love Belle. He loved her even when she was sad, and lonely. And Belle learned to love the beast even with physical challenges.
The Little Mermaid was another favorite of mine. Back then, I loved it for all the colorful fish, and mermaids, but now that I'm older, there's a new appreciation for it. It has been said that love speaks a language only a heart can understand, and in The Little Mermaid, it is epitomized. As we all know, Ariel can't speak, because she gave up her voice for a chance at being human. But Prince Eric still reaches out, and learns to love Ariel for all that she is.
My personal favorite, though, will always be The Hunchback of Notre Dame. Honestly, it makes me cry everytime I watch it. The characters in that movie are so human. There's trials for everyone, and it's not a movie based around romantic love, granted there is some romance involved, the movie itself is more about the evolution of friendships.
So really, is it healthy for us to believe in fairytales? Absolutely. We believe in things we understand, and have a desire for understanding, and love is one of those things that can't really be understood.
It's all about becoming better as human beings if you think about it. We all want to become better versions of ourselves. Other people help us get to that point.
Friendships. Relationships. Love.
They all lead ultimately to one thing.
A more divine understanding.
Not to say that love isn't going to give a swift kick in the ass from time to time.
But it will always be worth it.