If you see someone and decide you love them, you can make it true (sometimes). People can believe anything if they want to believe badly enough. Not saying that that's a good thing either.

Some women believe that a man who comes home from work every day and beats her loves her, and that she loves him. If someone can believe that, then I think that it's entirely possible to love someone who is neutral to you, i.e. whom you don't know.