I believe that there is more than one "right one" for all of us. The older we get, the more we hear, "All the good ones are taken" and other like comments. If we had only one soul mate and that soul mate were dead, we'd be seriously out of luck!
I'm not saying that it's easy to meet a right one. You have to put yourself out there, join groups and/or clubs, take courses, take up a sport or new hobby, go to cultural events that interest you, work for your political party, try online dating, etc.