Haven't played HU in a long time, and I'm just playing a bit at the $50s to get my feel back.

I played this guy for 15 mins or so and he was very weak/passive, and I took one buyin from him by stealing a couple of small pots. He left and came back a bit later and now seems to have adapted his strategy.
He's tight preflop but never limps. He seems to 3bet any med-high pp and any two broadway. He's always CBetting in raised and 3bet pots and has so far been reluctant to give up with medium strong hands.

Example: early in the match I have AQ, raise button, and he 3bets. I flat call (there's many hands I dominate in his range). Flop is K84r. He leads for the pot, and I decide to bluffraise here. He flat calls and calls of the remaining few $$ with 99.

After that I decided to bluff less and try to extract value but I'm not making any hands. He seems to have a bad run of cards and I gather a lot of small pots. Then this comes up:

I have $120, villain covers.
I have [Td], raise, villain reraises, I call. Flop: [Tc][6d]. Villain pots, I call?
Turn: . Villain bets 2/3 pot (his standard bet here). Are we deep enough here to have FE against a hand like KQ?

Another tricky spot (I battled back up to $170, he amply covers).
I have [7h] and raise, villain repops, I call. Flop: [7d][Qc]. Villain leads for $9, I raise to $30, villain calls. Turn: . Villain checks, I bet $60, villain quickly calls. River: . Villain instashoves. $75 to call in a $130 pot?

Any general recommendations for playing against this type of villain who won't allow you to bluff him off big pots, especially when the big pots go the wrong way?

Results?

Thanks for the input.

On the AT hand I flat called the turn. River was the , but unfortunately villain had KK and I lost a big pot.

On the 77 hand I called the river and lost to TT.

That sucks. I still think you played them fine.

I really didn't see the KK coming, and there's certainly no way to lay down nut flush HU. I'm also happy with the 77 call, although on that one, I do figure you're beat a fair amount of the time with that board development.