ARE YOU EVER REALLY OVER HIM?

We are all slaves to our past. Whether we acknowledge it our not. Our past is always with us. Either we are running from it, trying to change it or forget about it, working on getting over it, or just ignoring it and acting like we are okay. All in all the old saying is true, "You can't escape your past". So if this is true then are you ever really over someone?
I had a "friend" years ago that was who I thought was "THE ONE". He was this perfect guy in my opinion and I just knew that no matter what happened we would always be together. That in my mind was how the story was going to go. I had it all planned out; the house in the burbs, the two kids (one boy and one girl) I even knew your pets name. Never mind that he had never mentioned thinking that far in advance or even dating exclusively. In my mind it didn't matter because I knew where we were headed. Then the unthinkable happened and we not only broke up but moved to different states. That was more years then I care to count but I can still see the future that I had mapped out for us in my head.
I followed some of his life through mutual friends over the years and I now know that he was so not the person that I had made him out to be and that we really wouldn't have worked out in the end but every so often that thought comes back to me of "what if". You know the dreaded "what if" and now thanks to all the internet communities that shuffle people back into some of the same groups that they use to be in I am always tempted to look him up just to see if he is married or has kids or ended up living where I always thought we would. How crazy stalker is that? And all it makes me do is ask am I really over him.
Don't get me wrong I have dated other guys other than this one and I don't feel this with any of them. It seems that for some reason or another I can't let him go which is funny because I am almost positive that if he were standing right infront of me and asking me to be his in any way shape or form I would say no. That ship has sailed and I am not about to book a return ticket, but would I really?
Can you ever truly be over someone that you thought was the one and didn't do anything wrong? I think it would be different if he had cheated on me or hit me or threaten me or just something other than stop calling and move. Let's be real; everyone has done that. Yet it left this un-answered question in my head. I know that past is the past and there is a reason that it is behind you, but when you still have question can you put it behind you and just move on?