Trust the pin?

I only play online blitz chess nowadays, as I find the faster time controls to be more intense through the game.  This game was set with 5 minute time controls.  I have to say, if not for this site, I never would have won this one. I was paired up with some dude who was rated 200 points above me, so I was a tad more anxious than I normally am in my normal games. Needless to say, this one felt good to win.  Take a look, and look for similar patterns in your own games!

(Oh, so this is my first game to post to chess.com.  I have a bunch of games like these, with my *careful* annotations.  Let me know if you'd like me to post other games like these....  Enjoy!)