There is an unpleasant group of people you should stay away from for your own sake. I call them “energy vampires.”
Energy vampires are those perpetually pissed-off party poopers (don't you love alliterations?) who will suck you dry if you spend more than 15 minutes in their presence.
You can tell you’re with an energy vampire when you...
Energy vampires constantly complain and feel like the world owes them a debt—a debt it refuses to pay, which embitters them greatly.
Due to that bitterness, they love to gossip in the nastiest way about other people and feel like everyone's out to get them. If they're your friend or a family member, often they will subtly put you down every time you report a great success or are enjoying yourself too much for their taste.
You may even compelled to chime in on their miserable world view when you're with them. You may feel like they bring out the worst in you.
Stay away from those folks as far as you can. However, there's a good chance you already have one or more people like this in your life and don't know how to get rid of them. You don't have the heart to just blow them off, but you know this can't keep going on.
One thing you can do is try to de-manifest them. Here's how I managed to do this several times in my life.
Realize that the energy vampire reflects a part of yourself back to you that you don't like.
Your "external" life is a reflection of your "internal" life. Whether you believe that or not, just assume it's true for a moment.
That means everything that shows up in your outer reality mirrors something inside you. Everything in your world is there to teach you... including those people whom Carlos Castaneda's teacher Don Juan called "the little tyrants."
The little tyrants (part of which are the energy vampires) can be your greatest teachers because they reflect back to you a flaw in your own character that you either can't see or don't want to see. It's a part of what famous psychologist Carl Gustav Jung called your "Shadow."
When you work on looking at, integrating, and thereby resolving that part of your "Shadow" self, the energy vampire will go away because he or she won't find anything in your reality to attach to anymore.
Your friend who's draining you energetically and emotionally might move to another town or even state. Your nasty coworker might change jobs. Your family member might take up a new hobby that's extremely time consuming.
Ask yourself: What is it about this person that bothers me the most?
Name the one character trait that the energy vampire embodies for you. Is she a drama queen? Is he a miserable penny pincher? Is she always blaming others for her misfortunes? Is he convinced that the whole world is against him?
Pick what you like least about this person. Now take a good, hard look at yourself. Can you see the same trait in yourself?
As soon as you'll be able to acknowledge and transform this part of yourself, the "outer world" energy vampire will leave.
How do you transform it? By becoming aware and consciously stopping yourself whenever you display that trait.
There's much more to this, but I don't have the space here to go into great detail. I could write a whole book about this (and probably will at some point).
If this sounds esoteric and weird, just try it for yourself. Every little change in yourself will cause a change in your outer reality... but you will need to stay aware and "awake" to realize what's happening.
You may be amazed how well it works... and you're doing yourself a double favor by inviting more peace into your life and working on your own spiritual development.