Raise it to see where you stand. A raise to 4 $ should suffice.
If he moves all-in, you're probably beat and you fold.
If he calls, you have 3 options in my book :
- Turn is 9 : all-in
- Turn is

: all-in if he checks (flush scare card)
- Turn is anything else : check/fold
If he folds, woohoo.
Usually, he folds. I suggest the raise to get information.
He could easily bet out any pocket pair in his range, 2 through 10's. Only 3 of them have you beat (22, 33, TT)