Shame I knew one just like that :-( And I always wondered why such a beautiful person was single. One learns from difficult situation :-( Common Symptoms of Sociopathic Personality Disorder - wow! Lying and having no remorse or guilt. What a sad, miserable life.
Narcissistic Personality Disorder NPD - And they can be disguised as good friends until they decide to test the boundaries w/a psychotic break that they will later blame you for. The topic of positive thoughts as being helpful for myself pushed my friend into an unhinged break and all of the above resulted. BEWARE.