ugh, preflop is kind of gross in this spot. 3-bet is by far the best play with so many players to act behind you. If somebody else calls behind you it's kind of bad, and if there are multiple callers behind you then your hand becomes really tough to play. You'll probably disagree, but meh.

Given that he raised UTG, bet the flop 3-way, and called your raise with a player still to act behind you, this guy likes his hand. Could be a draw or an AK/AAish type hand. I'd probably bet this turn but I don't hate your play either. The ten on the turn makes 33 look like the only likely set out there in villain's eyes.