My knee jerk reaction was to jam but after seeing that you're deep w/ CO just flatting is fine. Not much left to say after omgcards, but yeah flat so that our combo draw isn't wasted on the SS, we could win a huge pot from the CO.
So I'm like 32% against a set I guess. I have no idea who this guy is but since it is 2NL I assume he does have some two pair and weaker draws? What is your play here?
Your assumption is correct sir.