Looks like you have the players' colors reversed in the post.
A couple of quick things. First, castle early. Move 7 looked like a good opportunity.I don't understand Qe7 there, and always be suspicious when someone parks a rook on the same file as your queen, your king, and especially both. If the King was off the e file, the pins would never have happened. Also, look at 11. ... de. I think that works to pick up his pinned knight.
I also noticed the game was a 7 minute time control. This may start an argument, but I think at your level, you should not be playing fast games. You need the time to think through positions and gain experience. I wouldn't recommend anything quicker than 30, and preferably 45+.
http://www.chess.com/forum/view/game-analysis/strategic-breakdown2
I have no clue what happened to the topic I first made but yeah, link to it here, because it won't let me edit/delete/reply to it so I didn't know what to do. Sorry.
But yeah, I completely lost on the d-file here because I guess I overlooked the total danger of that play. Any advice on what I should do better would be greatly appreciated :) Thanks!