Ok, I have to wade in.. Until I met my wife Kelly, I was the most un-monogamous type person ever.  I had many loves and a girlfriend for every day of the week.  I figured I was one of those folks who either had too much love for any one person or no one captured my heart 100%.
Guess what happened?  Cupid shot me..... In the buttsky as it turns out 
The day I sat down with Kelly and told her how I felt, I realized it wasn't a cheesy line.  I really loved her.  It was a new feeling for me.  I had my monday girl ready for me to pick her up and Kelly was still with me.  I called monday right then and broke it off.  I did the same with tuesday through sunday.  Kelly never spoke till I was completely done.  She asked me what my intentions were, as I just showed her the blackest part of my soul I'd never thought anybody could understand or accept.
Told her I loved her, wanted to marry her and give her lots of happy children.  
It's been 7 years or so.
Now........ Every once in a while the old part of me jumps up.  I know deep down it isn't a true crush, more a flight of fancy if you will.  I've had a so called "work wife" without benefits... a separate female companion I could talk about work without her falling asleep etc.  The weird thing is my wife and work wife became friends.  It really sucked.  Both of them would nag me, at home and work.. Did you take your blood pressure meds?  Don't eat that, too much sodium.. Don't get all worked up, you can fire him tommorow when you aren't going to stroke out.. I don't care if Ryder doesn't have any trucks; don't keep puling and whining...
No rest for the wicked eh?
In the end.. My wife Kelly is both my mate and my best friend.  I don't connect with folks in general.  Personality flaw I suppose;  Either folks like me or hate me... no inbetween ground.  I guess I'm fine with that.
So that's my complicated answer to a very simple question.. Its sorta kinda maybe... but depends...... And I promise you, that isn't a cop out.