Wow, what an open ended question.
I guess the answer would all depend on what a persons take on love is. Alas, no two view points are the same.
Have I ever been in love? I like to think yes. It working out and having my happily ever after though is a whole different story, but I still care deeply for the person and still wonder what he's getting up to and if he is doing allright at the odd moment. In the end both of us were to afraid to take that extra little jump off the edge of the cliff.
My idea of a perfect person. Just someone that compliment as much as they compliment me. Someone who challenges me to be a better person and expects the same from me. Someone different to fight with. And, above all else, someone who always comes home.
Pretty loose peramiters granted...
Hopefully you arent rejecting a possibility because he has brown eyes instead of blue or vice versa, something so specific isn't realistic, but I echo Graeme in saying don't worry so much about it. There's a life to live that will be missed if your too busy looking for love around every corner. Besides in our romantic addled brains wouldn't it be better to be blindisided by it anyway?
Steve