The queen is really good in the center and i dont want to move it. (9...Bxf3?? 10. Nxd5 Bxd1 11.Nxc7+ and white is better)
10. Bc1d2 Bb4xc3 11. Bd2xc3 Bh5xf3
I want to wreck the kingside pawns
12. gxf3 O-O-O
I dont want to trade downright now so i will just castle and connect my rooks
13. Qd1e2 Nc6d4
Because i'm fully developed, i will trade down now and get the advantage due to the pawn structure i have compared to white's. Trading is forced to not lose a pawn.