Villain is slightly aggressive, VPIP 33%, PFR 10%, Aggr 3.08, WtSD 15%, W$SD 50%.
I thought he might have a set, but given his aggr factor decided he could have a pair or a flush draw, and I probably had the best hand. Would you have played it differently? It's the second beat of this type tonight, frustrating.

Party Poker No-Limit Hold'em, $ BB (9 handed)

MP2 ($47)
MP3 ($73.85)
Hero ($49.25)
Button ($90.35)
SB ($66.55)
BB ($49)
UTG ($14)
UTG+1 ($53.95)
MP1 ($49.5)

Preflop: Hero is CO with , . SB posts a blind of $0.25.
5 folds, Hero raises to $2, Button calls $2, SB (poster) calls $1.75, 1 fold.

Flop: ($6.50) , , (3 players)
SB checks, Hero bets $5, Button folds, SB raises to $14, Hero calls $9.

Turn: ($34.50) (2 players)
Villain bets $34, Hero calls $33.25

River: ($98) (2 players)

Final Pot: $98

Villain shows [ 8d, 8s ] three of a kind, eights, wins $98.