13$ 6handed early; all in decision

[binarysmil]

Hi,

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (4 handed) by Hand Converter CG

BB (t1220)
Hero (t1420)
Button (t1340)
SB (t5020)

Preflop: Hero is UTG with 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to t120</font>, Button calls t120, <font color="#666666">2 folds</font>.

Flop: (t285) 5[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t180</font>, <font color="#CC3333">Button raises to t1220</font>, Hero ???

What do you think ? Obvious fold ?