too weak?

[guaranteedBluff]

Here's a hand from yesterday's part 500k guaranteed. Should I have pushed this turn?

I have ~1500, villain ~1000, blinds are 25/50, no reads on villain.

folds, villian limps in MP, I raise to 200 with JJ, folds, only villain calls.

Flop (t475) 567 rainbow. Villian checks, I bet 250, villain calls.

Turn (t975) 3, still rainbow. villian checks, I check....

River(t975) K, villain pushes, I fold.

What do you think??