What I've seen over the years is when you push someone away they come to you. If you give all your love to them they use you and eventually leave. Interesting phenomonon. I've been the victim of this little piece of data and also used it to rid my life of females I didn't want with me anymore. To this day my last wife thinks I love her. She left (11 years ago) and is now a full blown alcoholic. All I had to do is tell her I love her and give her a bunch of money. Gone, thank God. Dangerous girl.
I personally feel romance is the important determining factor. Look, if they don't want to be romantic forget it. That goes both ways. Men have a little more of a problem with it than women but even so if the women has no desire to be romantic - it ain't going to work either. No real love.