How should I have played this hand?

[navuta]

To clarify, I mean how high they are in relation to his stack, which is really what matters.

I think I had 40.000 chips and him a little less, around 25.000 chips.

Thats another statment that I should Have raised to 16.000 preflop.
Or just fold it.

But i think folding at that stage, having a much better hand would do the job.
But whasnt on this case.