Just a few orbits in at a 2/5 game in Lake Tahoe.

Villain older 40s most aggressive player at table. Raising most buttons and cutoffs. Only hand I see go to showdown he raises to 15 gets 3 bet to 40 by button flop is 632 check calls 60 turn 6 gets checked through river 4 he leads 100 gets raised to 280 calls to split his k5 suited vs q5 suited of button.

Hero is 30 and youngest player by at least 6 years but trying to look and play nitty as developing game flow and dynamics.

Cool so whats the question?

Sorry on my phone and accidentally sent. Anyways ...

Folds to me in cutoff with k3 suited 7 handed. Normally this hand is a dump but decide to hopefully use my image to win a pot

Hero raises 20. Folds to villain in bb who reraises to 55. Villain has 850ish I cover. While I will agree that such a small raise screams wanting action I also thought that this opponent was trying to take back control of pot and bully me since I has not shown much more then a passive game so far. I thought best response was to go for a resteal since his 3 bet range I still expected to be super wide and K3 does terrible for a flat even in position. Thus I 4 bet to 155, this bet is also to balance my 4 bet range

Villain calls flop. Pot 307 after rake. Flop 83K rainbow. Villain check calls 175. Now I did expect this villain to check call 99+ and maybe as light as AQs. This was the biggest game running and in the bigger games c-bets are quite the norm and usually most players now auto call c-bets as the growing trend in games I play

Pot 657. Turn 7 bringing back door diamond draw. Villain checks to me.

So what line should I take? Bet a little small and hope bb spazz shoves thinking I am weak? Continue with normal half pot bet? Shove which is basically a pot size bet? Or check hoping to induce a river bet by bb? Also if I do check behind what do I on river if 8 comes 7 comes backdoor diamond comes in ace or paint? Personally any non counterfeiting card I feel I should stack off if I take said line but want to hear all opinions

V starts with 850... calls 155, then 175... leaving him with 520??... pot is 657...
If V has AK or AA, he's calling.
If he's got a set or bigger two pair, you're calling.
If he's on the str8 or flush draw, he's calling.

Unless this guy is trappy - and you think he'd check/call with the nuts (like KK or 88) - I don't see a reason to check it back.
I'd bet 520 with my 2 pair thinking I'm good.

Most V's won't call off 2/5 of their stack and fold.
Also, shoving on turn might look desperate and get him to call light.

(BTW... in his shoes, I don't think your image has got 2 pair here - unless you were being creative with 78. So I'd put you on a one pair hand and call with anything that beats that.)

But since this is live - it's very villain dependent.
Also - you didn't give suits of cards (yours or board) - so it's hard to know if the K is a diamond or not (which makes AKdd stronger).

I did not have flush draw. Yes I did not think player would think my image to be anything more then 1 pair. AK and aces are the two hands that make the most sense considering I 4 bet. So I need to play to get a spazz specially considering I can't get him to call off anything that doesn't beat AK that wouldn't also beat K3 except 78. I think 99+ feel better with a light shove with redrawn then light call off but then again this is why I ask

You know you're getting into trouble when you're continually changing you reads on the situation. In pf, you first start off with, "I've got a nitty image, I'm going to use it." After you get raised you think, "he thinks I have a weak enough range that I can be pushed off my hand, so I'm going to balance by 4 betting."

It follows on with on the flop you think he's calling you with 99+, AQ+. Does he really think your range includes AT?

As for the rest, you bink 2 pair and he's at pot commitment on the turn. If he's calling a small bet, he's calling the rest of the stacks. Just stick it in.