Villain is seems like a donk, he's running like 65/30 over 20 hands.

PokerStars No-Limit Hold'em, $6 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($631.05)
UTG ($882.10)
MP ($261.45)
CO ($617.80)
Hero ($546)
SB ($868.40)

Preflop: Hero is Button with 8, J.
UTG raises to $18, MP calls $18, CO calls $18, Hero calls $18, SB calls $15, 1 fold.

Flop: ($96) 4, 8, 3 (5 players)
SB checks, UTG checks, MP checks, CO checks, Hero bets $55, SB folds, UTG folds, MP folds, CO calls $55.

Turn: ($206) 2 (2 players)
CO checks, Hero bets $130, CO calls $130.

River: ($466) 7 (2 players)
CO bets $198, Hero ???? easy fold?

Villain here is running like 50/30 over 50 or so hands, but he seems actually ok postflop (well still bad, but not a spewtard or calling station). I was worried because i actually think there are a lot of hands with a Ten in his range... what's your plan on this river?

PokerStars No-Limit Hold'em, $4 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($450)
SB ($606.05)
BB ($898.30)
Hero ($400)
MP ($394.50)

Preflop: Hero is UTG with J, K.
Hero raises to $16, MP calls $16, Button calls $16, 2 folds.

Flop: ($54) J, Q, 6 (3 players)
Hero checks, MP checks, Button bets $40, Hero calls $40, MP calls $40.

Turn: ($174) K (3 players)
Hero bets $120, MP calls $120, Button folds.

River: ($414) 9 (2 players)
[color=#CC3333]Hero ????

Villain is newish and has been running kinda loose. No reads postflop. Should i be folding this anywhere, the river is really gross... i felt like i should've lead it but i checked to quickly without thinking.

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO ($424)
Button ($512.25)
SB ($284.95)
BB ($275.65)
Hero ($400)
MP ($591.80)

Preflop: Hero is UTG with Q, A.
Hero raises to $16, 2 folds, Button calls $16, 2 folds.

Flop: ($38) J, 3, Q (2 players)
Hero bets $24, Button raises to $56, Hero calls $32.

Turn: ($150) 3 (2 players)
Hero checks, Button bets $112, Hero calls $112.

River: ($374) A (2 players)
Hero checks, Button bets $328.25 (All-In), Hero calls $216 (All-In).

Final Pot: $918.25