Sometimes fate gets in the way of love. It is quite heartbreaking to know or think you’ve met “the one” only to see circumstances thwart what could be. Often there’s not much you can do when life pitches you this curve ball. You can but hope it steps up to the plate again and you get another chance. Otherwise, all you can do is ask “why now” and move on.
Perhaps you had only just broken up with somebody who you had been in relationship with for a long time, and at that point the thought of diving straight in to another romance didn’t feel like the right thing to do.