Limerence - Wikipedia
Tennov estimates, based on both questionnaire and interview data, that the average limerent reaction duration, from the moment of initiation until a feeling of neutrality is reached, is approximately three years. The extremes may be as brief as a few weeks or as long as several decades. When limerence is brief, maximum intensity may not have been attained. According to David Sack, M.D., limerence lasts longer than romantic love, but is shorter than a healthy, committed partnership