2 pair vs loose/passive

ok, I cant use HH (something about SQL Error : 1064) so.. im gonna try this way.

PokerStars No-Limit Hold'em, $0.05 BB (8 handed) - Poker-Stars



BB ($10)
UTG ($2.68)
UTG+1 ($6.94)
MP1 ($5.17)
Hero (MP2) ($9.53)
CO ($4.91)
Button ($11.71)
SB ($5.45)

Preflop: Hero is MP2 with: 8c,8d
UTG calls $0.05, 2 folds, Hero calls $0.05, 1 fold, Button calls $0.05, 1 fold, BB checks

Flop: ($0.22) 2c,5s,6s (4 players)
BB checks, UTG bets $0.15, Hero raises to $0.50, Button calls $0.50, 1 fold, UTG calls $0.35

Turn: ($1.72) 6d (3 players)
UTG checks, Hero bets $1.50, 1 fold, UTG calls $1.50

River: ($4.72) Qh (2 players)
UTG checks

UTG has 70% VPIP (50 hands) and ive seen him flat call air and nuts alike... should I b/f? check?

bet, he calls with 5's,2's 77..33..44...and the air that you said, he prob raises TT+ pre so all that beats ya is qx and 6x, and sometimes 34, and 99