I think he holds a lower pair than you have. But he could be holding a weak ace to. I would push this flop if I had a tight image myself.
Whats your image? This is a very tricky flop. But if he is this aggressive wouldnt he push with a strong ace like AK or AQ preflop? Has he pushed any hands preflop before? Will be nice to hear what others day. I think your preflop play is just fine.