Do i get away from this?

[Knekk]

PokerStars No-Limit Hold'em Tourney, Big Blind is t600 (8 handed) internettexasholdem.com

UTG (t20007)
Hero (t13175)
MP1 (t5375)
MP2 (t16954)
CO (t14888)
Button (t13550)
SB (t59183)
BB (t9770)

Preflop: Hero is UTG+1 with Q[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t1800</font>, <font color="#666666">1 fold</font>, MP2 calls t1800, <font color="#666666">4 folds</font>.

Flop: (t3950) A[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t2400</font>, MP2 calls t2400.

Turn: (t8750) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t3600</font>, MP2 calls t3600.

River: (t15950) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t1800</font>, Hero calls t1800.

Final Pot: t19550

Should i have thrown my hand away earlier in the pot?

Even though i felt that he had me on the river i felt i had to pay him off. I have seen him make a small bet like that on the river earlier with the nut straight.