Acceptance of the thoughts I had.

How do I say goodbye to the memory and the residue of these thoughts that I once thoughts that I have?  I know that I have been obsessive with him for over a year.  I have accepted the fact that my obsession is nothing to be proud of.  He was a very handsome man, but no matter how he looks, it is only an obsession. I am so saddened that he is gone, never to return.  I realize that I may come across as crazy but I feel like falling in love with this guy and other things.  The other things is a sign that I am losing it.  I would like to let go.  Goodbye, even though he is like a drug to me.  I need the courage to not just to accept it, but to let him and the thoughts go.