NAB, you can't possibly be in love with the OM. He is not the same person. Look at yourself now. Are you the same person as 15 years ago? You have grown, changed, matured, some bits for the better, no doubt some for the worse. Your experiences have moulded your view on life.
You love the idea of the love you had when you were young. You love the man you remember him being.
You are not being silly, but harsh as togaparty's words are, they have a ring of truth.
Have you ever heard the fable about the dog who is carrying his bone across a bridge? He looks in the water and sees a much bigger, tastier meatier bone. He tries hard to reach it and strains and strains. Every time he moves it gets away. Eventually, he drops his bone into the water to give him a better chance of reaching the better bone. Only to see that it has disappeared. It was only a reflection. The dog lost his real, perfectly tasty lovely bone because he chased one that looked better.
Be careful, because the more I read, the more like that story your situation sounds