Hand ---- > http://wt.ag/MY1YiG

Co 15/15 af 1.5 cbet 100 ftcbet -  wtsd 57  FT3bet 50%    82hands

BU 55/17 72 hands

PF = I think it's a good sq spot, I`ll get plenty of folds from Co, and Bu could fold as well or call with weaker holdings. So bluff vs Co , value vs Bu.

Flop= I think Co`s range here is fairly strong and contains a lot of A`s so I decide not to cbet.

Turn = After he checked flop I though he`ll have some PP pairs that he`s now giving up on turn so I went for the bluff.

River = I though that there were not many hands in his range that would call turn fold river so I gave up.

Result = A lot of bb`s spewed. 

How would have you approached this spot? Where`s the flaw in my thought process?