nl100 FH in unraised pot, villain has a hand 2

[Frawa]

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

SB: $99
Hero (BB): $167.15
UTG: $188.50
MP: $168.75
CO: $77.85
BTN: $134.75

Pre-Flop: Q[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] dealt to Hero (BB)
3 folds, BTN calls $1, SB folds, Hero checks

Flop: ($2.50) 2[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, BTN checks

Turn: ($2.50) 2[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $2</font>, BTN calls $2

River: ($6.50) Q[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $6</font>, <font color="red">BTN raises to $14</font>, Hero raises to ?

villain is 58/16/2.8 over 80h

how much should i bet