I disagree about 11. ... b5 being good. Thinking in terms of long term strategy, it permanantly weakens the c6 pawn and he can never really free it from being weak due to the d5 pawn. It also places another pawn on a light square, further restricting his light squared bishop. If he can't find a way to trade that piece, he strategically doesn't have any real winning chances in an endgame. This forces him to try and win the game in the middle game, but the closed position doesn't allow him to use his bishop pair. He needs to open the position to use his bishop pair properly and I dont think b5 was the right way. That's just my opinion though.

11...b5 is interesting and good i think because c2-c4-c5 w/tempo on the bishop is the problem. b/c i don't think black can break this queenside clamp b/c say c4-c5 Bc7 0-0 b6 b4 a5 a3 is possible, the rook is defended.

I suppose to allow c4 is possible but then to play c5 for black becomes more difficult, then black could maybe respond to c4 w/ ...b6 i guess but in this case white has a freer hand on the queenside. so i think 11...b5 is best, i don't see the qside structure as a real problem.

13...Rb8 to me is a mistake, why give white the a-file, maybe Qb8 instead. this mistake is a result of white's good preparations for qside play.

white rerouted his pieces well, and had few problems. nice game.

You play with a lot more patience than I do. I hate sitting back to defend. Well played.