Villain is 34/24/6 (3bet) over 62 hands.

PokerStars - $0.10 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

Hero (BTN): $11.93
SB: $11.14
BB: $19.47
UTG: $9.70
MP: $7.18
CO: $29.90

SB posts SB $0.05, BB posts BB $0.10

Pre Flop: (pot: $0.15) Hero has A J

fold, MP raises to $0.30, fold, Hero calls $0.30, fold, fold

Flop: ($0.75, 2 players) 4 3 J
MP bets $0.40, Hero calls $0.40

Turn: ($1.55, 2 players) 7
MP bets $0.80, Hero calls $0.80

River: ($3.15, 2 players) 4
MP bets $1.00, Hero raises to $3.25

Is this raise too thin, especially given the board paired? I figure I'm probably over-repping my hand here but I'm trying to focus on getting the maximum value out of my hands and I just don't think villain is gonna fold any Jx hand here on the river.