Sociopaths are manipulative, and some are dangerous. If you know someone with several of the following attributes, your best bet is to stay away from them.
1 Superficial Charm
2 Narcissistic
3 Pathological Lying
4 Manipulative and Cunning
5 Shallow Emotions
6 Lack of Remorse, Shame, Or Guilt
7 Incapable of Human Attachment
8 Constant Need for Stimulation
9 Lack of Empathy
10 Poor Behavioral Controls / Impulsive Nature
11 Promiscuous Sexual Behavior / Infidelity
If you have a sociopath in your life, especially in a romantic relationship, you are going to suffer. Avoid these people. Don’t be fooled by their charms—it is just an act to get what they want. Sociopaths are extremely cold-hearted. The only person they care about is themselves. They see all other people only in terms of usefulness and as potential targets.
via How to Spot a Sociopath: 11 Signs & Traits of A Sociopath.