Nothing left... could I have won?

I would love people's opinions on the outcome of this game.

I know I made at least one bad blunder early on, but what I'm more interested in is the 2nd half of the game. Who had the advantage when, and what do you think the outcome should have been?

Game 1153914

You should have played on from that final position. Black's King is stronger.

62. ... a4 looks premature to me. Why not improve the rook position first with Rd5 and Rd2 etc.... Black seems to have winning chances.

don't be so loose w/ ur pieces...u need to hold on to em. and always check.sometimes its ok to sacrifice but...well maybe its just cuz i prefer to keep my knights...