KK Against tight player

[Esau fos]

I've been sitting with this guy for a while and his stats say 16.9/13.5/4.6 over 90 hands. He has only been playing good hands so far.
I wanted to get HU with DaUser so I reraised from the BB.
On the flop I made a potbet because I thought I had the best hand. Then I got an AI reraise... What to do in this spot against this kind of players?
curious about your toughts

Titan Poker Lucerne 0.01/0.02, hand converted by the iPoker Converter at Talking-Poker

saw flop | <font color="#C00000">saw showdown</font>

Button Pegasos77 ($1.95)
SB calamar37 ($6.05)
BB <font color="#C00000">Hero ($6.01)</font>
UTG Supaboyx ($5.13)
UTG+1 <font color="#C00000">DaUser96 ($5.25)</font>

Preflop: Hero is in the BB with K [img]/images/graemlins/club.gif[/img] K [img]/images/graemlins/diamond.gif[/img]
Supaboyx raises to 0.08, DaUser96 raises to 0.24, 2 folds, Hero raises to 0.70, 1 fold, DaUser96 calls 0.48.

Flop (1.53) Q [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/spade.gif[/img] 3 [img]/images/graemlins/spade.gif[/img]
Hero bets 1.50, DaUser96 raises to 4.53, Hero.....???