My 25+ year marriage is actually the product of "predestined love" and I think most people could end up with a love like that. The reality is that you have to keep your eyes open if you want to notice the person that's right for you ... and you have to meet enough people to find them.

EDIT:

As I thought a bit more about it, I also realized that you have to have some criteria for what you're looking for in a partner too. How will you know if you've found them? If all you can come up with is "a body like a swimsuit model", you deserve what you get. Looks might be one criteria, but maybe you'd be better off picking some other attributes to go with it? And perhaps weighting things like interests, life-goals, etc a bit higher.

I'd also recommend understanding your Myers-Briggs type and the types that are compatible (this is not your sign). Then learn the attributes that make up your compatible types and try to spot them in public.