I made 4x BB Open Raise because this opponent calls very widely.
He min 3bets, I call.
Nut flush draw and opponent cBets, I reraise, he calls.
Turn, what now? Should I bet or check? I check and hope to hit my flush. IMO betting doesn't make sense because it seems very likely that opponent has Ace in his range and won't ever fold, and if I miss my flush on the river, I will have a very tough spot.

Here are basic stats of opponent:

30 means WTSD

How should I play this hand against super loose and aggressive player?

iPoker - €0.02 NL (6 max) - Holdem - 5 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

UTG: 108 BB
Hero (CO): 135 BB
BTN: 163.5 BB
SB: 100 BB
BB: 94 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Jd Kd
fold, Hero raises to 4 BB, fold, fold, BB raises to 7 BB, Hero calls 3 BB

Flop : (14.5 BB, 2 players) Ad 6s 8d
BB bets 5 BB, Hero raises to 16 BB, BB calls 11 BB

Turn : (46.5 BB, 2 players) 9s
BB checks, Hero checks

River : (46.5 BB, 2 players) 7s
BB bets 23 BB, fold

BB wins 43.5 BB