Being a spewtard, I would probably call and evaluate the turn.
A lot of scare cards can hit which might find him checking which you can then exploit.
He could limp A2/A3 if he has a lot of rubbish to go with it or 23XX, so he could have even flopped 2 pair.
A check call on your part defines your hand as a drawing hand or top pair.
You have 5 outs to the nut high, if villian has flush draw he has a lot more and is a clear favourite in this hand to scoop if he has the low ball as well.
Depending how I felt I could probably fold here as there is so many outs that give the other player a scoop and you have 5 outs to give the high and probably need runner runner just to lock the low.
I typed this as I thought about it, so it probably doesn"t make sense.