Common traits of a stalker
Stalkers aren't evil looking people. They are often very ordinary, charming and intelligent. They are very convincing and able to manipulate others. They often have several of the following characteristics:
Obsessive and compulsive
Falls "instantly" in love
Can switch between rage and "love"
Sense of entitlement
Blames others for his problems
Views themself as a victim of circumstances, society, family etc.
They need others to give them their identity or sense of "self"
Can't take no for an answer
Has problems distinguishing reality from fantasy