I'm gettin butt fucked with no lube yet again. What are you doing on this river?

Villian is a complete nit... 6/3, but only 27 hands played

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (Button) ($35.55)
SB ($25)
BB ($25)
UTG ($27.25)
UTG+1 ($25.35)
MP1 ($25.20)
MP2 ($29.95)
MP3 ($33.20)
CO ($5.30)

Preflop: Hero is Button with K, A
1 fold, UTG+1 raises to $1, 4 folds, Hero raises to $3.50, 2 folds, UTG+1 calls $2.50

Flop: ($7.35) J, 5, 8 (2 players)
UTG+1 checks, Hero bets $5.20, UTG+1 calls $5.20

Turn: ($17.75) 9 (2 players)
UTG+1 checks, Hero checks

River: ($17.75) A (2 players)
UTG+1 bets $11.25, Hero feels like shit.