He thought very long on the flop and eventually called, i pushed the turn and he called after 3 seconds with [Qs], i don't improve.

I really think he should have layed down on the turn/flop when i kept on representing a hand that beats 2 pair, maybe he put me on a worse 2 pair but if he had any kinda sense of me he should know i don't call OOP with Kx Qx kinda hands.
The flush came, i played it like a set or semi bluff flush draw .

Thanks for all advice, it's really appreciated.

Actually I think Ice is wrong. IF opponent has AK it is better to push all-in than to check/call his all-in.

Yes he is free-rolling BUT the pot is too big. There is $114 in the pot already, if opponent folds Hero wins $114. If opponent pushes and Hero calls Hero will win $259 20% of the time but split 80% of the time (ie: win 1/2 of $114 which is 57).

So...

Check call gives a profit of $57 80% of the times and $259 20% of the time, pushing gives a profit of $114. Played five times the check/call will average (57*4+259)/5 = $97.4. Pushing will win an extra $16.6.

If the pot was smaller it would be better to check/call a push but with the pot this big, it's more profitable to get him to lay it down.