DIAGNOSIS: Tunnel vision. A disease where ones attentions are solely focused on another.
Symptoms will include, but are not limited to: daydreaming, staring, deteriorating health, insomnia, as one focuses on another in the hopes of sharing equal sentiments. This disease is not contagious and not always reciprocated.
Recommendations: It is a foolish human affliction. I would not recommend anyone giving in to it willingly.