$1/$2 NL 6 max...

I raise to $7 with [Jd]. BB calls.

No read other than last round he called my raise from the BB and led 1/2 pot into a KJ9 flop . I raised pot with nothing and he folded.

Pot $15. Flop [Tc][3h]. Check / check.
Pot $15. Turn . He leads $8. I call. I didnt raise because I didnt feel like I could call a reraise and by just calling I figure he will bet his whole range on the river hoping I am chasing the flush with one big
Pot $31. River . He open shoves $75. OK, I figured he would bet, but this doesnt look like a bluff to me.

My thought process in a situation like this is:

Why would he shove if he made his flush? Wouldn't he want to get paid off and make a bet I'd likely call? He prolly missed with the in his hand.

Then again the overbet might be done just to make me think exactly that and I'd want to call

So my first instinct is a busted draw, however the pot is small and we really didn't invest much in it. I'd probably lean towards fold... When I do that I always feel like I folded the best hand and when I call I'm usually wrong though. So not sure if I'm much help here.