I believe he has a point, A lot of long haired women you see are probably in relationships and grow their hair because of their partner. My girl did the same thing for me when I spilled the beans to her, she let hers grow and we have fun keeping track of her growth. I dont think she'll let hers get any longer than this tho...she said shes maxed out and actually wants to cut it back a bit. Its a bit much for her.
But long story short I dont think youll find many single women with such long hair, youll have to find a partner and they will grow it for you...