2/5 NL, 280bb deep vs good reg, decision point on all streets, middle set...4bet pot!

7 handed 2/5, around 3am, players are tired , still 2 fishes left but table seems like it's gonna break soon

Hero HJ (1400) QsQd raise to 15
Btn fish flats (225)

BB good TAG (covers) raises to 70
We have alot of history with BB, I consider him to be a really good player, he probably thinks the same of me. We usually play higher but no big tables running at the time.

Hero 4! to 250? I think this deep we should have some 4b value /folds, but maybe I could've just called to keep fish in. Also sizing I think 200-250 is good this deep, but maybe 250 was a bit too large...anyways

Btn folds, BB flats

Flop AhQh8c (517)

BB checks, Hero 125, BB calls

Turn AhQh8c 6h (767)
BB checks, Hero 275? BB calls

River AhQh8c 6hKd (1317)

BB checks, Hero ? I have about 770 left I think V has all combos of AK, 50% combos of trapped AA and all combos of KhKx that get there on the river. I would give him maybe 25% of combos of JTs and KhJh (not sure he flats pre).