Am I over thinking this hand? ($550 live hand)

[southgapoker]

Opponent is a tight player. He's not raising with anything here even though he is the CO. My image is the most aggressive one left in the tournament. I am raising 2.5 times an orbit taking the blinds and antes most of the time. I have also made some (what the table perceived) as loose calls when I was getting odds in previous AI situations.

Down to 17 or 18 players (there are 9 at my table; don't know if there was 8 or 9 at the other one) from 79.

Final 9 pay. First place was right around 12K. Second was 7500. Ninth was $1350. I don't remember the rest. You get the picture.

Blinds 800/1600, 200 ante
CO raises to 5000. He has 40000 total. He had the second most chips at our table and probably the second most in the entire tournament. I had just doubled him up a couple hands prior with JJ < AK.

I am in the SB and have 88. I have 50-55K. Push? Call and see a flop?