Infatuation is the state of being completely carried away by unreasoned passion or love; addictive love. Usually one is inspired with an intense but short-lived passion or admiration for someone.
Infatuation is common emotion characterized by unrealistic expectations without positive relationship growth or development. In the case of infatuation there is more often than not an obsessor and an object of desire (generally unattainable).
One may come to the conclusion that unlike love infatuation is not mutual.