$10 NL

Villain is UTG, kinda short-stacked, and plays lots of crappy hands.

saw flop

MP3 ($42.70)
Hero ($12.25)
Button ($3.75)
SB ($15.25)
BB ($4.00)
UTG ($4.50)
UTG+1 ($10.00)
MP1 ($12.65)
MP2 ($9.80)

Preflop: Hero is CO with 8, 8. SB posts a blind of $0.05.
UTG calls $0.10, 1 fold, MP1 calls $0.10, 2 folds, Hero calls $0.10, 1 fold, SB (poster) completes, BB checks.

Flop: ($0.50) 8, 2, 3 (5 players)
SB checks, BB checks, UTG checks, MP1 checks, Hero bets $0.25, SB folds, BB folds, UTG calls $0.25, MP1 calls $0.25.

Turn: ($1.25) T (3 players)
UTG checks, MP1 checks, Hero checks. (Board looks safe - Should I just bet anyways here?)

River: ($1.25) 5 (3 players)
UTG bets $0.25, MP1 folds, Hero raises to $0.75, UTG raises to $4.15, Hero ?. Do I pay this off every time?