I feel like before I meet someone new I have to issue a statement. A caveat emptor, if you will.

"I am sad. I've been sad my whole life and I will continue to be sad. You can never change that. You could never save me; it's not your responsibility. Even when we're happy, even at the happiest moments, the ones that make you feel complete and at peace with the universe, you will look into my eyes and know that I am in another place that is neither despair, nor apathy, nor anguish, and you can never be there with me, or pull me out."

and, well, if you can't live with that then you might as well get out now.