Should I be cbettting if he is never folding a pair here?

[SilentNoise]

Poker Stars - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker Hand History Converter)

Hero (SB): $221.90
BB: $197.00
UTG: $175.55
CO: $236.60
BTN: $71.05

Reads: <font color="blue">Villain is a 50/21/4 over about 35 hands.</font>

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (5 Players)
<font color="red">UTG raises to $8.00</font>, 2 folds, <font color="red">Hero raises to $30.00</font>, BB folds, UTG calls $22.00

Flop: ($62) 8[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero bets how much if at all??

During my short time at the table ive 3bet 3 times or so and haven't been called once preflop yet. This is the first time somebody has called my 3bet.

If hes never folding an overpair or any pair on the board, or any draw, should i be betting here?