Hi chopper,
My name is Leo and I play as 2k on KGS. I will have a look at your game and leave some comments to provide you with some ideas how to improve your game.

Summary:
In the opening you built a lot of center influence while your opponent took relatively small but secure territory in three corners. As a result after move 30 White had more points but you had good influence and your goal had to be to turn this into enough territory to win the game. As you realized yourself move 31 (as played in the game) was not the best way to do this. I showed you some possible variations and my favourite option.
White made a mistake playing too small moves in the center. Therefore you got the chance to play move 33 to make good territory on the upper left side.
In the end game both players did some mistakes. But you got the bigger end game points and finally won with a small margin.

There was one mistake I found two times in this game. At move 23 and move 31 you stopped playing locally when you had to add another move. Before playing elsewhere I would recommend you to check if there is a very good follow-up move for your opponent locally. If there is such a move it is most often worth spending another move for the local situation. Otherwise your opponent will get the good move and you will have to answer anyway. So you don't win anything if you play elsewhere too early.

I hope you will enjoy the review. Good luck for your next games!