Welllll, it's exactly as the name implies, friends who suck the energy outta you. Pretty sucky to think about huh? (ha ha... aren't I just hilarious). The truth is we all have one, someone who when the phone rings you think to yourself, "do I really want to answer this?" I know it sounds kinda awful, but we really do need to have supportive, loving people around us.
How do you deal with this you ask? Set boundaries. They call- say you only have x number of minutes to talk.
It's that simple. That or cross them off all together if you can. One doesn't need to waste energy dealing with Negative Nacy's.