Oh yes!, there are people, that can come in to your life, and can be negative. It use to really upset me,  effect me, to the point, where it would leave you, giving up and sinking in to a pit of despair, putting your hands up and saying what is the point.

This is how I view it now, the minuite I recognise negativity and resist it i.e. "they should not be negative", "why are they finding so many things wrong", "why can't they find the positive in life" etc,  then I become negative about their negativity, and to just notice this with in myself, is usually enough for me to turn it around, and to be the positive I want to be in life, to be true to myself, be the example I wish to see. And in turning it on its head, I have found, that I have gained more understanding, which has lead to a compassion for others. 

There will always be people, that believe they are living a nightmare, and are so convinced by it, that their is nothing you can do to shake them from it, except love them, but most importantly love and be gentle to your self.

Yeah, I have a few of those peeps in my existence. I think in addition to what Very said, sometimes it's that they want so much for themselves and are so frustrated that they can't be happy for anyone else.

 That's my theory, anyway, and I do find it sad