Cash HU NL Tough river spot against solid regular

[PartyScout]

Ok bit of history guy is 61.35%vpip 9.82% prf TAF 0.39% over
163 hands.No prevouis history he made a few great marginal calls where i was bluffing outta my skin so he knows im capable of bluffing which some times im using to control pots nicley as if he has a hand he cant expect me to call much for a showdown.Personally i think his TAF says it all i have called down 3 big river bets up to this point all times he has had it and only 1 occasion he 3 barrelled a missed flush draw and only 30% potted me i called down with 2nd pair and took it down on that ocassion.
How this 1 played out i didn like the cold call on turn or flop maybe he has a set str8 or flush a really dont know?Im more inclinned to think flush with how it played out.

What do we think im gonna add a poll

FullTiltPoker Game #xxxx: Table Drop (heads up) - $0.50/$1 - No Limit Hold'em - 22:49:09 ET - 2007/03/19

Seat 1: PartyScout($138)
Seat 2: Villan($208.20)

villan posts the small blind of $0.50
PartyScout posts the big blind of $1
The button is in seat #2

*** HOLE CARDS ***
Dealt to PartyScout[Ad Qc]

villancalls $0.50
PartyScout raises to $4
villan calls $3

*** FLOP *** [5s Ah 7h]
PartyScout bets $8
villan calls $8

*** TURN *** [5s Ah 7h] [Qd]
PartyScout bets $24
villan calls $24

*** RIVER *** [5s Ah 7h Qd] [8h]
PartyScoutchecks
villan bets $72
PartyScout nice catych
PartyScout A-Q
PartyScout has 15 seconds left to act
PartyScout is sitting out
PartyScout: dimonds ace q clkubs
PartyScout has timed out and folds
Uncalled bet of $72 returned to villan
PartyScout has returned
villan wins the pot ($71.50)

*** SUMMARY ***
Total pot $72 | Rake $0.50
Board: [5s Ah 7h Qd 8h]
Seat 1: PartyScout(big blind) folded on the River
Seat 2: villan (small blind) collected ($71.50), mucked