Worts line probably..., vs reg, no reads,

Bet on flop is standard, turn bet sizing 1/2 is better probably, river card is pretty confiusing for me, what can I do?
Can I get call from worse hand If I show? How many bluffs he has, if he Show? So I decided for fold, but my feeling was terrible.... Do you have some advices? Thanks :)

Blinds $0.25/$0.50
UTGBrastart $48.58
COdureth $52.84
DRicky Morty $110.18
SBHero $55.02
BBsuperchaton8 $51.96
Preflop

Hero is SB $0.75
AhQh
1 fold, dureth (CO) raises to $1.25, 1 fold, Hero raises to $5.50, 1 fold, dureth (CO) calls $4.25

Flop

$11.50
2s9h5d
Hero bets $3.75, dureth (CO) calls $3.75

Turn

$19
2s9h5d Kd
Hero bets $7.50, dureth (CO) calls $7.50

River

$34
2s9h5d KdQs
Hero checks, dureth (CO) goes all-in $36.09, Hero folds