Sicilian game problem

This is a game that i played vs a stogner oppponent. Can somone help me with a suggestions about what i did wrong cos am getting similar position in few games of mine ( when i play sicilian )  

It seems to me like you move your pawns too much creating many weaknesses. Somewhere around move 15 I'd play Bf6, b6, Bb7 and it seems playable. Don't know if you noticed but you had created a huge weakness on b6. You should avoid leaving you pawn like that without the possibility of defending it with another pawn. (For instance I prefer to develop my queenside pawns with a6 and b5 asap.) 

Also I'd play h6 instead of g6. Seems like g6 keeps your king safer.  

I'm also avoiding the d5 move in these kind of positions; seems like the d5 move was a waste of 2 moves in your game (11...d5 - without any particular aim, and 14...Rd8 - just retreating a piece) that could've been used for the development of your c8 bishop. 

So my general advice is: move your pawns very carefully, you can't move them back later on. Remember some of the basic pawn structures in the sicillian defence (you can go over some GM games in some database) and as your game progresses just choose one of them. 

Good luck :)

18...g6 killed you. Look at the way your opponent's pieces suddenly dash into that breach you opened. It's as if the door to your king's privy chamber was opened wide to the public while his majesty was on the crapper - what a scandal!

At move 18 there were a few plans you could have pursued:

+ Double your rooks on the d-file and take control of it, it's a super-highway directly into your opponent's position.

+ I've heard that if your opponent is attacking on the wings you should counter attack in the center: you can push your e-pawn and and try and break up those dominant looking White bishops. So maybe 18...Bf6, 19...e5. You control the e5-square already at move 18, you should take control of the center with e5. 19...e5 would open a pawn hole on d5 for his knight, but it's 4 moves from that square while it sits on f3 so not too much danger there. You might prep e5 with h6 first ensuring none of his pieces come around the side; or maybe not, as it opens up the possibility of a bishops sacrifice and attack on your king. Once at e5 the threat is the pawn-fork on e4 if you can get sufficient support behind the pawn for such a push.

+ There's a pawn hole there on d4 for your knight; would be a supported pawn hole if push your e-pawn to e5, too.

on move 20 I feel bg7 would have been better than Re8.You caould have got rid of Black's black b at least.

You never developed your queenside in the opening. Solid although passive defence is ok, but the open C-file is your friend with your bishops at  (d7) an (e7) bringing your queen rook to the open file and given the chance your queen to (a5) . Starting operations  in the center before you have completed your developement in the sicilian is not wise, as white generally always has a space advantage and free developement in that sector. LOL