I wasn't there, but it is my opinion from your description in OP he probably isn't playing back at you yet. He might just think you have hit a couple flops with your c-bets. If you are raising him to take his pots, this opinion changes.
I know you know this, but beware of the limp re-raise. It doesn't take someone playing back at you to do it. A lot of fish do it for two reasons: 1) They are afraid to raise and "lose" a chance to make money with such "great" cards cause everyone will fold to their PFR. 2) They figure the worst that can happen is it gets checked around and they have a "ultra-powerful" hand that is well hidden. Mmmm, fish yummy.