i don't think that 7 helped him, the only thing he could have for that is pocket 7 else he would probably had KJ and waited till the river to bet and get more money from you.

i was sure he had KJ

Could be KJ, if u dont think he'd raise pf with that

Also looks alot like a missed spades draw

when they bet that big they have something 95% of the time

These are pretty good players at this level.. if they're gonna make a move on a missed draw they have to bet big to get folding equity. He has to raise minumum in the $110 range... $160 is a good size move, and raising to $200 exudes confidence.

I'm not saying its wrong to fold here.

He overbet the pot, that's KJ most of the time. Or a set. Either way, I think two pair ain't good here. Hard to say without specific reads, but by calling here, I think you'll end up crying yourself to sleep more often than not.

its a unraised pot, your opponent could be on any number of hands, instead of betting on the river and running into nuts, i think you should check-call river for the most value. KJ would do 1 of 2 things here. he could value bet anywhere from 30 to 50 dollars, which, from your river bet, is a call. he could push, which makes it a harder decision. at that point you will have to go off of reads/gut, would ur opponent bluff at it with a missed draw; does he overbet on the river with a monster hand; has he put you on a hand and how is he playing off of that read, etc.