This is a full ring table temporarily down to 5 handed. Villain is Eric Liu, playing 14/10/2.0 (FR). He seems to play very solid.

I'm at 18/15/4.1 (FR) and my 3bet% is 9.3. I don't 3bet very loose oop, but I don't know if he knows that.

Hero (SB) ($1289)
BB ($2099.25)
UTG ($1420.50)
MP ($2767)
Button ($2445)

Preflop: Hero is SB with K, A
2 folds, Button raises to $35, Hero raises to $125, 1 fold, Button calls $90

Flop: ($260) J, K, 7 (2 players)
Hero bets $115, Button calls $115

Turn: ($490) 8 (2 players)
Hero bets $112, Button calls $112

River: ($714) A (2 players)
Hero ??? (around $950 behind)

It's a tricky spot since both our ranges are very wide here. I think c/f, c/c, b/f and perhaps even shoving all have some merit. The only really bad move here is b/c imo.