Intense game

http://www.chess.com/livechess/game.html?id=85188778

Here's a game I played. Can someone review it for me, please? I drew, but I don't think I played my best.

1. As a dragon player, I know that black can't afford the time to play 9...Re8. Besides, this just weakens his f7 square.

2. I am not certain, but I think 10...Rb8 is more accurate.

3.11.Nxc6 opens the b file for black's imminent attack on the queenside. It was better to play 11.h4

4. 18.g4 just slow down the attack. Better was 18.Bh6! with pressure on the H-file.

5. 19.Rxh5 gh 20.g6! wins for white. Trading queens was a horrible choice.

Since I''ve been playing the dragon for a long time, I know many of the thematic ideas in the opening. White pushes his H and G pawns up the board, plays Bh6, and tries to mate on the H file. Oh, and don't forget to play Kb1.

Black goes for Qa5/Qc7, Rac8 (or, as Cristopher Ward liked to play,Rfc8), push his queenside pawns, and play Ne5-c4.

I don't see why white didn't play Bh6 instead of g5 on move 18. Why not exchange off black's strong bishop and then get mating ideas on the h-file?