Soul Mates or Soulmates?

Is there any such thing as a soul mate? If you type it as one word, you get that red squiggle tell-tell, that calls out a mistyped word, and thus soulmate is not recognized as a word.

But separately, they work: soul mate; no red squiggle. Isn't the idea behind a soul mate, something about destiny bringing two separate people together as one, as if they were fated, destined to be together, coming together in a chance encounter that changes their lives forever? One half of the other, completing one another in some movie-dramatic type way?

I have a theory that something has to be the same between two people (and no, both of you having two legs, arms and eyes won't count) but something significant. Most typically, I think it's the eyes (similar shape, or color), perhaps it's your name (Ryan and Rian for instance), your personal cause, your love of (fill in the blank) that connects you. Whatever it is, I think you know immediately upon meeting(sometimes before you know what links you) and you can do one of two things: run screaming, or embrace it (as if you'll escape it--you are soul mates for gosh sakes!There is no escape.)

So, starting today, I will be linking the two words that so belong with one another and proclaiming to the world that the word is spelled: soulmates! May you be with, or find yours, soon.

Best,
Andrea