DOES ANYONE KNOW WHERE I MISSED MATE

Even from move 32, you did it pretty well. You kept on checking, taking free pieces and stopping him mating you, until you eventually got his Queen. It doesn't matter how long it takes to get the Mate, as long as you've got the time to do it.

You can run it thru the computer and see if there's any mate-in-# (depending on your search depth) output.

I don't see a missed mate in one. There was a missed opportunity with 14.B-a3, attacking black's rook and clearing the way for R-c1, doubling the attack on the pinned Knight.

You had 44. Qf8+, winning the queen and mating your opponent shortly thereafter - but I don't think there was a missed mate in 1 anywhere.

Maybe 44.Qf8+ Kd7 45. e6 + kxe6 46. Qe7+ Kd5 47 Rd1 Kc4 48.Rc1 +- However you did not leave mate in 1. The move Qxf5 does not work because after Kd8 Qg5+ Black can play Kd7 Qe7+ Then Kc8 which stops Rc1. Though Bxd6 earlier would have earlier won the game.
I had a similar idea in mind: 44. Qf8+ Kd7 45. e6+ Kxe6 46. Qe7+ Kd5 47. Qe5+ Kc4 48. Rc1+ Kb4 49. Rxc6. Now that I look at it again, the b4 square is controlled by the bishop, so only 48...Kd3 possible, and then 49. Qe3#!

On the 10th move, by the way, e5 was a much-much stronger move, possibly a winning move. Black runs into a standard attack with the Bxh7+ and rook lift idea he can't defend from, unless he plays 10...Ne4 - but then after 11. Bxe4 dxe4 12. Ng5 and 13. Ba3 black is in a heap of trouble. It doesn't lead to any direct mates, but it would win you the game easily.

you missed early mate, and on move 16 Qxc8 wins!! how could you not spot that??! You also missed 28 dxe5. if you opponent hadn't been a scared fool, he could have saved his knight, and your attack would not have been enough.
No, I examined that and it does win a piece, but far from mate.