Since White won and you were frustrated, I presume this was Someone Tough vs You (by convention, the 2nd player listed played Black). I have a few ideas for Black in this game.
13...f5 helped open a line from White's a2 bishop to your king. Very dangerous. A few moves later White could have won your e7 bishop after 15.d6+ Instead, 13...Re8 to support e5 would have been better.
15...Bd6 was needed to stop 15.d6+ but White didn't play that fortunately for Black.
17...Nc5 or 17...Qf6 would have developed some pieces to much better squares.
On move 22, Black needed to move the rook on e8 to a8, b8, c8 or d8 to save it. After that Black was down a rook with an unsafe king.
29...Qc1+ would have avoided having Black's queen pinned to the King.
To improve, you might take a look at http://www.chesstactics.org/. It helped me.
I wanted to try more than just re-acting this time around. I find some of the 1500 players here are amazing, let alone the crazy 1800+'s! I'm just not grasping the major stomping ability that I see when I observe other players. I just move stuff around rather than understand...and it's quite frustrating :(