I read a children's book once...well actually several times...well gosh, I actually pass this book on to those that I have the insight to recognize who they are to me....The Little Soul and the Sun, by Neal Donald Walsch, author of Conversations with God.
I think I want to believe in Soul Mates...as though some contract was drawn up pre-birth, so we can remember "what kind of "special" we are...and we remember who we are to each other. There are so many lessons to love...one's soul mate does not need to be their spouse or significant other....
Don't you remember your parent(s) saying "Just wait until you have your own children"...well in part...my child is my soul mate....my point is, I think that deep, significant relationships choose to reflect the soul..both good and bad, but constant and enduring.
So I have several life relationships that are soul mates...in one way or another we made a contract to remember who we are to each other.....