You say "I played 2...d6 because I was apprehensive of ...Nc6 3.Bb5 Nd4 4. Nxd4 exd4 and doubled pawns". Nc6 Bb5 is the start of the Ruy Lopez, which is the most heavily analysed opening in chess.
your next note, "Here I was thinking to play ...Nxd4 10. Qxd4 Nh5. Opted against it.", good thing you didn't do that line, cause you would leave the rook on h8 hanging to a Qxh8, and your queen on d8 hanging. Based on how well you played, I think there was a problem with your comment.
45. Kf6 seems like the wrong way for your king to go, I would have thought long and hard about Kd5... f4 was a weakening move for white, you could play Rg1 at some point, and then his rook gets tied to its defense. I think you have good winning prospects at that point in the game.
I think you played a very solid game.
Another draw. I don't know how to feel about this one. Got a draw although my pawn structure was all over the place. Thought my opponent could have gone on and won too.
Any comments are appreciated.