Pacific, $0.02/$0.05 No Limit Hold'em Cash, 5 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $12.19 (243.8 bb)
BB: $6.87 (137.4 bb)
MP: $5.20 (104 bb)
CO: $10.04 (200.8 bb)
Hero (BTN): $7.29 (145.8 bb)

Preflop: Hero is BTN with Kh 9h
2 folds, Hero raises to $0.15, SB folds, BB raises to $0.52, Hero calls $0.37

Flop: ($1.06) Ks 3h 4c (2 players)
BB bets $0.53, Hero calls $0.53

Turn: ($2.12) 4h (2 players)
BB bets $1.59, Hero calls $1.59

River: ($5.30) 7c (2 players)
BB bets $4.23, Hero??

Did I play this hand okay? Villian is 18/15 with a 9 % 3 bet (7.4% 3bet from BB sample size 14). I called flop once to see if he would barrel again with the plan of taking it on the turn. But I turn a flush when he barrels the second time. River really sucks but obviously I cannot call. I should never fold river through right?