folding KK preflop 50NL

[rianb]

Ok so maybe i'm being a little results oriented but it seems players at this level won't get it all in pre with less than AA, and i've been stacked 3 times my last 3 sessions with KK>AA. Here's an example that just happened:

eff stacks $55, i raise KK in the HJ, CO repots it. I've played with this guy a little the last couple of days and he's been 3 betting me pre more than most, don't think he gives me much respect so I'm not too worried about him. SB repots to about $25. I really want to fold but can't because I'm a station and get stacked by AA.

I really don't think many players at this level get it in with less than AA but I can't seem to lay down KK pre, is this a huge leak?