31/19 calls and he calls loosly. whats the best overall line? i think i may of over thought flop and put myself into a spot i didnt know what to do. I think im messing up in pots like this. If you say its a clear c/b just bcoz flop has a FD then whats the plan if its rainbow.

$0.5/$1 No Limit Holdem
6 players
Converted at weaktight.com

Stacks:
UTG P18 ($100.00)
UTG+1 lckyf1sh ($143.22)
CO shipthewhip ($121.89)
BTN Hero ($98.50)
SB IGotThem ($160.03)
BB Stevieee83T ($67.94)

Pre-flop: ($1.50, 6 players) Hero is BTN
P18 calls $1, 2 folds, Hero raises to $5, 2 folds, P18 calls $4

Flop: ($11.50, 2 players)
P18 checks, Hero checks

Turn: ($11.50, 2 players)
P18 bets $6, Hero calls $6

River: ($23.50, 2 players)
P18 bets $17, Hero ????