I dated for 15 years before I got married, I went out with dozens of women over the years but never fell in love. I wanted to and I always expected it would happen but it didn't. Many of the women I dated turned out to be good buddies after the break ups but it never was more than that.
Once I got into my late 30's I began to realize it wasn't going to happen so I married one of those good buddies. We still are buddies but that's it. We are basically platonic room mates and have been since the beginning.
Now I do fall in lust almost every day, every time I see someone I'm attracted to. And I have to admit that for most of my single life that was enough. Good sex was never a problem back then, but I just never met anyone I wanted to spend a lot of time with. I guess I get bored easily or maybe it is all just bad luck.
Whatever the reason I have pretty much reconciled myself to the fact that it's not in the cards for me. Mind you, I do hold faint hope that one day she'll walk into my life and I'll fall head over heels and from what I understand, it's pretty cool when it happens.