1. You played this badly.
2. Just calling and then not looking to get it all in on the flop is bad IMO.
3. The flop fold is so weak i refuse to comment.
4. AA versus KK happens. If you are so afraid of losing 100bbs with KK versus AA all in preflop go and read a thread about where 5000nl players say they can only fold it preflop for 100bbs against a few known regulars and just suggest 'KK versus AA happens'

After all that, 3 bet preflop and probably call a push at these stakes. However if it were me id three bet and fold to a push becuase you should find bigger edges in the game IMO, especially when you play your cards face up and still face agression (particularly if your opponent is 18/9 and shows the possibility of being able to play)