200NLCASH I flop a flush but the stacks are VERY deep

[Vinetou]

PokerStars No-Limit Hold'em, $2 BB (2 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($579.60)
Button ($545)

Preflop: Hero is BB with 8[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Button raises to $6</font>, Hero calls $4.

Flop: ($12) 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $10</font>, <font color="#CC3333">Hero raises to $36</font>, <font color="#CC3333">Button raises to $105</font>, <font color="#CC3333">Hero raises to $204</font>, <font color="#CC3333">Button raises to $634</font>,

Before you say: this is automatic, don't see monsters under your bed and that stuff - LOOK AT THE STACKS and realize this is 1/2NL. We both have almost 3BI on the table. Should I fold here? I can't see him doing this without a flush here and the only flushes I can beat are 52s and 95s and 32s. It is true that I have been superaggressive up to that point but I can't see him doing this with a set (maybe there is 5-10% chance he is doing this with a set). On the other hand, I can't see how I can ever fold a flopped flush. This is sick, but am I supposed to fold here? Or would you play it differently, just calling reraise on the flop and trying to keep the pot small and maybe folding on the river because then it would be obvius he has me beat? What do you think about that hand?