Gotta just call this river raise right?

edit: He called my first two bets in like 2 seconds each.

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

SB: $50.25
Hero (BB): $107.25
UTG: $6.95
CO: $74.30
BTN: $153.50

Pre-Flop: 5 5dealt to Hero (BB)
CO raises to $1, Hero calls $0.50

Flop: ($2.25) 7 7 5 (2 Players)
Hero bets $1.50, CO calls $1.50

Turn: ($5.25) A (2 Players)
Hero bets $4, CO calls $4

River: ($13.25) J (2 Players)
Hero bets $10, CO raises to $21.50, Hero calls $11.50