His personality is obsessive, possessive, and jealous.
He is extremely attached to the person he is in love with, and he can be a bit extreme in showing his affection. He will do anything to keep that person by his side, and will not hesitate to resort to violence or manipulation to get his way.
He is constantly thinking about that person and will go to great lengths to win their attention and approval. His love can be passionate and intense, but it also has a dark side. 