Looked to me like you were aware of the problems with your position but did nothing about them.
On turn 10-11 the White queen needs to be challenged, and the d5 and b5 squares need coverage (or the c3-knight removed). You mentioned both but did nothing 11...Nc5?! What was your reasoning for this move?
The White queen seems very well placed to me on b4 to support the advance of the c3-knight: it covers the b2-pawn from your bishop after the knight comes forward, it puts pressure on the d6-pawn which prevents, or makes harder, the move e7-e6 (which would cover the d5-square from knight occupation), it attacks your undefended b7-pawn, and it's fairly safe from attack.
I liked 11...Qb6 (connects rooks, challenges queen) then exchange, or maybe 11...Nb6 followed by 12...a6. I think I liked your move 10...Ng4 but it does relinquish control the of the crucial d5-square to White and hang your knight (b7-b6 maybe better ?).
Your position after move 9. is solid but passive, like you've scrunched into a ball waiting for the kicking to start.
I don't know anything about the Sicilian, but why not 4...Nc6 or 5...QxB followed by 6...Nc6 - I thought the knight belonged on c6 in the sicilian?
More desparation to exchange down was needed from you I think with his queen advanced and his pieces gathering around it to support an attack on the queenside.
I have been playing chess seriously for 3 years. I love the game and have decided to learn the game by reading books, articles, playing, etc. I very much want to improve my chess so I bought 2 books, 1 is titled The Complete Chess Player by Fred Reinfeld, and the other is Ultimate Dragon Volume One by Eduard Gufeld and Oleg Stetsko. I love the sicilian and have probably played about 1000 sicilan games, but have NEVER studied the opening.
I am on page 10 in the sicilian book and about page 50 in the other one, so I have a long way to go with my understanding of the Sicilian.
I have decided that the best way to improve my chess is
1. Read my chess books with a chess board in front of me.
2. Analyze the games I play, concentrating on the games I lose in order to recognize my weaknesses.
3. Play no more blitz chess.
4. Play 60 min. minimum games, and after the game analyze it thouroughly.
5. Try to only play players that are stronger than me.
6. Practice tactics with online systems.
7. During long games, write down all structural and positional thoughts. Also write down all calculations. Writing down my thoughts improves future analysis and correction of mental error.
I love the concept of posting a forum topic, because it is a very good way to analyze the game and get feedback from good players. Below is the game I just played about an hour ago, any feedback, constructive criticism, is all very much appreciated.