I do use the word "soulmate", but I define it a bit differently than the traditional "One And Only" idea. For me, a "soulmate" is a person whose personality fits well with yours, one who you feel a deep connection with, and with whom you can share your deepest thoughts and feelings with. A person who appeals to you on a deep level, one of a relatively small proportion of humanity with whom you can have such a connection. I call my boyfriend my "soulmate". Is he the only person in the world I could've had such a relationship with? No. It's possible I might've found someone else who I would've called my soulmate had my life gone on a different path (or possibly not; not everyone finds a suitable partner in their life). But of all the people I know, he's the one I have the deepest connection to.