NL50 Stack a Donk with AA

[Numfar]

Sadly, it turns out that I'm the donk.

Firstly, no Hud on Everest (AFAIK) so no stats but generally that site is very loose passive and I hadn't played a hand with this guy so I guess he was pretty tight. Also, I don't know of a HH converter for Everest so I've tried to make it readable.

EverestPoker Game #2211420026: Table Doha-37 - $0.25/$0.50 - No Limit Hold'em - 05:31:10 - 2007/10/14

Seat 1: Galudon ($59.82)
Seat 2: Lynce13 ($8.00)
Seat 3: Billy1000 ($43.65)
Seat 4: Madcow75 ($20.70)
Seat 5: yostyle ($58.27)
Seat 6: Numfar ($53.70)

Madcow75 posts the small blind of $0.25
yostyle posts the big blind of $0.50
Lynce13 posts $0.50
The button is in seat #3

*** HOLE CARDS ***
Dealt to Numfar[Ad As]
Numfar raises to $2.25
Galudon folds
Lynce13 folds
Billy1000 folds
Madcow75 folds
yostyle calls $1.75

*** FLOP *** [Kc Js 3d] Pot = $5.25
yostyle bets $2.50
Numfar raises to $8.00
yostyle calls $5.50

*** TURN *** [Kc Js 3d] [6h] Pot = $21.25
yostyle checks
Numfar bets $15.00
yostyle raises to $30.00
Numfar raises to $43.45 and is all-in
yostyle calls $13.45

I have a problem with hands like this because I feel as though once I commit to betting the Turn, I have put half my chips in and I can't fold. Unfortunately, I'm never ahead as far as I can tell.

Do I just fold to the c/r or am I too committed & I'm up against AK or KQ enough?