How did I manage to win this game?

I have played 60 games by e-mail against the same opponent (who is a very strong player), and have lost 59 of them.  Game number 60 was my first win.  Did I play a very strong game?  Did he feel sorry for me and decide to give me the game?  Or did I just get lucky?  Can someone please take a look at the moves and tell me what you think?  I really need to know whether I really earned this win, or whether I just got lucky.  Thanks.

P.S.  I'm not very good at analyzing my own games, so it would really help me if someone could analyze this one for me.

you are the next Carlsen! :)

people mess up correspondence chess like noone's bussinnes - I guess maybe he just blundered - did you go on to play more games?

Well, I thank you for at least responding.

He made several major blunders.   I'm guessing the next game will be a better barometer of whether you've gained the upper hand or whether he was just cocky and unfocused for one game.   

Thanks radareau, I appreciate your comments.  I was surprised by one or two of his moves, so perhaps you have hit the nail on the head.  I don't expect to win another with him any time soon.

Dillydream - forgive me for laughing. 59 ? omg, u deserve a photo in the dictionary under the word "persistence" ! Congrats.....I'm sending you a little gift !........it's on its way....

@indian1960:  You're forgiven.  It really is funny.  But he's an awfully good chess player ... usually.