Long story short,

I had bad oneitis for a girl. Eventually after a long time I'm dating her. During the time we are dating my oneitis is gone, I no longer find her interesting and I'm not attracted to her. We split up 7 months ago. My oneitis is back for her and I think is special.

Why is my oneitis back for her after us splitting ? Especially even after being with other women , even one that was far more attractive Thanks a lot.