A Sociopath Usually Starts Out As The Most Charming Person In The World

Dr. Jeckyll and Mr. Hyde behavior:
A sociopath usually starts out as the most charming person in the world. But at some point, the mask is dropped.
 Instead of loving every little thing you do, they start finding fault. Instead of finding everything about you fascinating, you come to realize that they could care less; they minimize both your accomplishments and your heartbreaks.
 
In place of the sweet, loving, and playful person you fell in love with, a cruel, detached, critical, or ridiculing stranger takes over.