How do you know?

How do you know if he or she is the one? Just caught me by chance again while browsing blogs. I've seen people going into courtships, couples getting married, couples getting divorced. In the midst of all these, I wonder if he will be/is the one.

Will he be the one I'll live with for the rest of my life?

Will he be the one that I CAN live with for the rest of my life?

Will he even be the one I can't live without?

Sometimes the questions make courtships all the more mysterious, all the more scary yet exciting at the same time.

It just creates never-ending questions that I become so unsure myself.