heads-up battle

[marbles]

online game from the other day... Loose and a little more aggressive than usual.

Folded to the CO who limps, I raise in the SB with red tens, BB folds and CO limp-reraises. Hmm... Looks like a big pair or big cards, eh?

Flop comes 237, all spades. I checkraise with my overpair, and he 3-bets. Yep, sure looks like a big pair, but I'm calling him down just in case.

Turn is another brick, 6d if I recall correctly. Check-call.

River is the Tc. I bet with top set, and he raises. I 3-bet, he caps and I call.

What would you do differently?