Don't check back the turn, just bet bet jam everytime you don't get raised or the river is an ace. You clearly got 3 streets of value from a bunch of hands. The thing is he "shouldn't" have any boats on this board given positions. But since it's nl25 and he could be terrible he might have 33,44,66... He could raise worse for value as well. You could call turn and fold river even tough it's a bit insane but still.. People don't bluff enough and you got exactly the hand it looks like you got. It's just a weird spot, I think you should analyze more common spots instead of this one.

We are definitely getting 3 streets of value. So don't ever check back this turn :)
As played, I think you can call & fold river like Sweet16 said.