Opp is 29/19/4. My guess was he is on a draw, but I still think this is bad. What's better? To me it looked like he was trying to bet/3bet with his pot sized flop bet so I decided to call, call again, and then call again. I really hated the way I played this.

Party Poker No-Limit Hold'em, $ BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($172)
CO ($37.55)
Hero ($132)
SB ($88)
BB ($86.85)
UTG ($85.20)

Preflop: Hero is Button with 6, 8. SB posts a blind of $0.50.
3 folds, Hero raises to $4, 1 fold, BB calls $3.

Flop: ($8.50) 8, 3, 7 (2 players)
BB bets $8, Hero calls $8.

Turn: ($24.50) 2 (2 players)
BB bets $20, Hero calls $20.

River: ($64.50) 3 (2 players)
BB calls $54.85 (All-In), Hero calls $54.85.

Final Pot: $174.20