Flush on the turn in Un-Raised Pot

PokerStars, Hold'em No Limit - $0.01/$0.02 - 8 players
Hand delivered by Upswing Poker

UTG: $1.58 (79 bb)
UTG+1: $2.02 (101 bb)
MP: $1.85 (93 bb)
MP+1: $2.80 (140 bb)
CO: $4.86 (243 bb)
BU: $2.04 (102 bb)
SB (Hero): $1.74 (87 bb)
BB: $1.00 (50 bb)

Pre-Flop: ($0.03) Hero is SB with T♥ 8♥
1 fold, UTG+1 calls $0.02, 1 fold, MP+1 calls $0.02, CO calls $0.02, 1 fold, Hero calls $0.01, BB checks

Flop: ($0.10) 9♥ 4♥ J♠ (5 players)
Hero checks, BB checks, UTG+1 checks, MP+1 checks, CO bets $0.04, Hero calls $0.04, BB calls $0.04, UTG+1 calls $0.04, MP+1 folds

Turn: ($0.26) J♥ (4 players)
Hero bets $0.08, 2 players fold, CO calls $0.08

River: ($0.42) A♥ (2 players)
Hero bets $0.20,

flop checks around to CO who bets, I put him on middle or top pair a portion of the time he can do this with flushdraw,straight-draw but I think because there are a few of us in the pot and his bet size was near pot I think his range is more pairs than draws. on the turn I hit my flush so I bet out trying to extract value and see where I stand, I want to bet for value but also keep whoever might have middle-pairs, a Jack and some straight draws in the pot. My plan is to possibly fold on a river if another heart comes and someone shows significant interest in the pot.CO just calls and now I am thinking he has a Jack, maybe A9 with ace of hearts sometimes a draw, with hands like QT. I think his range here is mostly pairs because of his pot bet on the flop and then his flat call on the turn. River comes Q of hearts and I felt like it was a decent card for me because it leaves only K and Q of hearts that beat me , I bet half pot, what do you think about the way I played this hand and what do you think about villains range?