Me: "I said I would probably not make that."
He: "You said possibly, not probably. They are two different things."
If you've ever met one of these people, have a read. A book I recommend is Emotional Vampires by Albert Bernstein. It's caught the eye of lots of friends on my bookshelf and nearly every, single one of them knows one of these people. I'm pretty sure you'll know at least one of them too!