Weak fold?

Didn't know what to do here. Is this fold really weak? At this level, I don't really expect a semibluff with a flush draw on the flop. There also shouldn't be that many hands with an 8 that call my preflop raise. (And furthermore trip 8s might possibly be scared of the flush on the turn.) Dunno. I guess I went with the overarching principle that at this level most people have the goods when they start making raises and large bets.

$0.05/$0.1 No Limit Holdem
9 players
Converted at weaktight.com


Stacks:

UTG		($10.45)
UTG+1		($9.00)
MP1		($2.00)
Hero		($7.75)
MP3		($11.05)
CO		($11.90)
BTN		($9.90)
SB		($2.45)
BB		($3.25)

Pre-flop: ($0.15, 9 players) Hero is MP2

3 folds, Hero raises to $0.3, 1 fold, CO calls $0.3, 3 folds

Flop: ($0.75, 2 players)
Hero bets $0.5, CO raises to $1.5, Hero calls $1

Turn: ($3.75, 2 players)
Hero checks, CO bets $2.1, Hero folds

Final Pot: $3.75

CO wins $5.7 ( won +$1.8 )
Hero lost -$1.80