Where_am_I wrote:
^ Excellent advice. They'll reveal their nasty side pretty soon after that, so be prepared to run!
Not always even that, sometimes they can be adequate as work friends or other arms-length relationships. Ideally they should never read you as suitable for fulfilling what they're after (ego-wise) so that you're never useful enough for them to see as worth trying to use.
Part of how people like that operate is they make emotional transactions always serve their interests so maintaining boundaries to ensure that can't happen tends to keep them from
feeding on you, so to speak.
The traits these people have make it difficult for me to tolerate them (even at arms length), and I manage to easily offend them with my bluntness. I repel them as much as they repel me. It all works out for the best!