New Player - Lost big hand badly

$2/$4 No Limit Hold-em

1 -Evan (10)
2 - Colin (31)
3 - AceintheHole (62)

Evan - On the Button
AceintheHole - SB
Colin -BB
*** HOLE CARDS ***
Dealt to AceintheHole A 9

Evans calls - 4
AceintheHole calls - 2 [4]
Colin raises - 2 [6]
Evan folds
AceintheHole calls 2 [6]

Flop (K K 3 )

AceintheHole bets - $15
Colin calls - $15

I'm trying to make him think I have a king and get him to fold.
He says to me, I think you don't have a king since your trying to buy the pot. I wanted him to fold but he called me.

Turn (K K 3 ) (2 )

AceintheHole checks
Colin - All-in - $10
AceintheHole - All-in - $10

I was already pot commited I thought I had no choice but to stay in.

River (K K 3 2 ) (7 )

Colin shows K K
Colin wins pot with 4 of a kind.

How would you have played this hand differently?
When should have I realized he had at least a King?
Thinking about it right now once he called me ($15) after the flop I should have realized he had a K.
During the time I thought both of us where bluffing but I had a Ace so I stayed in till the end.

1. Your flop bet is a wasted effort. You think you're repping a king for trips, but people who flop a monster rarely bet that big. If you're going to bet there, go with a more vague bet: 2/3 of the pot or less. Maybe 1/2 the pot.

2. The turn is an easy fold IMO. You don't beat anything except a bluff from a hand worse than your A-9 high. You're not that pot-committed. Let's make an assumption here that he has pocket eights or worse, and you have six clean outs (aces and nines). That's about 8:1 with one card to come. His bet is $10 into an approx. $45 pot, for pot odds of 4.5:1. So even in a pretty good scenario where he has something but you have six outs against it, this is a poor call. I'd only call this if you had some compelling read on him that said he was likely to re-raise you with a small pair or something like QJ, and then smooth-call a big bet on a dangerous flop, and then push all in in a situation where he knew you might feel obligated to call. In other words, you'd have to have a read that he was a total idiot to make this call. Otherwise it's a clear fold.

What is with the stack sizes. how come you can raise $2 when bb is $4?? weird. I guess you are just playing with your friends but try to play with at least 50bb stacks, this is no poker, just lottery..

think how would a K play and play accordingly, 1/2 is plenty. Fold on turn. you hear some nits babbling about being pot committed but that is rarely truly the case. you have no outs, and if you do you only have 3 which is about 7% giving you no odds to call here..