Villain had 3-bet me from his BU 3 times now in the past 10-20 hands.
Explain that one to me. His BTN is your BB, right?
Are you getting 3-bet in the BB that much?

2 hands earlier I woke up with AA and he had raised from UTG with 88 I 3-bet he called flop came
775 rainbow, flop went check check
Do you think checking IP is your best line, here?

It's hard to imagine AA don't represent the top of your range, here.
AK is worth betting here most of the time, so why not better hands?

You can profitably b/c any A in your pre-flop range here when it's HU OTF and you're IP against most players.

turn was a 6 of spades leaving 2 spades on board, villain bet double pot ($.70)
I can over top with $1.35 all in and he called showing 88 river didn’t help him. Idk what to label him at this point but I don’t think he’s playing optimal that way with 88.
Is fine. If you're not folding to the 2x PSB, then you need to ship over the top.
Doesn't mean you shouldn't have folded, though. Probably, but you haven't calculated your optimal line, here. Just taken notes on a single instance. That's great for the table, but study it away from the tables by putting a range on each action and all that stuff.


***
In the posted hand.
Fold PRE. EZ game.

As played, fold River. EZ game. Not even close.

Villain wants a call OTR, especially given your history. He knows you can call big bets with less than the nuts. He wants you to call this river bet. He's got at least an A in his hand and can beat a bare A in yours almost every time, here.