Its quite simple. I know a person who dislikes my attitude and has no courage to argue with me but talks nonsense just to irritate me.
Ignore the person
No one has the right to spoil your mood. Once any one has a negative impact on your emotions, cut the person out of your life.
Unfriend the person
Though you ignore the person, its easy to have a sneek peek at your life through the social media.
This person may be a common friend. Ensure to keep yourself unavailable for any chats in any socializing events
Do not disclose everything about your activities so that there are chances of getting stalked.
Clean psycos will always have some dignity and mind their own business if they understand your motive.