You could visit it a thousand times without getting tired or bored. You could spend hours, days, a life, dining al fresco at small tratorias or wandering by the river and among the piazzas.
The first time I visited Fire Island was in 2010. It was love at first sight!
You caught a glimpse of it from travel books, movies, literature. Step off the plane and somewhere between the warmth and the vastness, you'll know in no time. It's all here.