Soul mates. Fact or Fiction?

Despite my situation I will always believe that every one has a soul mate. My question is however what if you have a soul mate and you loose him/her? I feel I have found the man of my dreams the one I could spend my life with but some where when life was happening we lost track of each other and the relationship lost its meaning in all of that. Life happens and no matter what we can't prevent it from continue to move as much as you want to stay in a moment. So easily are we able to miss out on things because we tell our self it will be there tomorrow. Months ago any one could look at us and be sickened by our unconditional love. We were picture perfect. As life keeps moving and we become even more comfortable with each other and living together things changed. Of course it always begins with the little things and as a women I sort of giggled and reasoned it as him being comfortable with him self around me. More and more the home that I now share with him becomes him and things start getting pushed to the side lines. This I didn't realize till today. As I sit, in what was once "our" room where his stuff was tied in with mine, alone. To us there was always tomorrow to go on that long over due date and get out of the house where more and more became the walls I was constantly surrounded by. After the break up, the yelling, the crying, and the shock that your other half is gone my phone rings. Did it take all of this for a relationship to be fixed? Or once a relationship is this far broken repairing it is no longer an option? Regardless of my day, or even the past weeks I still feel I have found my soul mate. Now the question is he lost forever? Did I loose that once we lost track? Or is the idea of a soul mate some thing made up to make us feel better when we are alone, to give us assurance that some day we will meet that one that will love us for ever?