I think it depends on the opponent, but in NL2, it's a fold on the flop, clean and simple.
The population tendency in NL2 should be considered. And I'm one of the NL2 fish, using the opp's line often.
From opp's point of view, on preflop, he called CO open. So many NL2 players call from BB widely, even with AJx - AKx, TT-KK.
On the Flop, 52T 2-suited board does not hit strong to anyone's range. What makes the opp to check/raise on this flop? Unless he is a tricky regular, he would not x/r with KTx or QTx. It is a set or JJ-KK (or even AA sometimes), sometimes ATx (especially from a TAG reg). Flush draws or OESD would just call in most cases. If you just fold 100% of the time without a good Equity (OESD, nut-flush draw, at least top two pair) on this spot, how many of your opponents would exploit this? None in NL2. So, you could fold without any regrets.
In NL2, try to fold every time (except you have the nuts, of course) when someone x/r on flop and check your win rate after a while. It makes huge difference in BB/100, at least in my case.
Or, if you are really curious, re-raise 2.5x and hope that your opponent folds, but he would not. By raising 2.5x, you are punting 50BB, but it is cheaper than to call the next two streets. However, by re-raising and folding, you could set up a condition to take the whole stack from your opp when you hit nuts on the flop.
And why the opp is betting 2/3 pot on the turn? He is either bluffing or has something. What hero has? 7-pair only. Your flush draw is not a nut-draw.