77 on BTN vs Reraise outta the Blinds

[bussolini]

Villain over ~ 100 hands on about 22/22/4. pretty solid and very agressive.
when i made moves from the btn he raised a lot. i folded my mediocre hands.
where is my line here? fold pre? on flop? or calling to wait for his turn-action?

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $99.25
BB: $125.60
UTG: $9.75
CO: $24.40
Hero (BTN): $66.80

Preflop: Hero is dealt 7[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] (5 Players)
2 folds, <font color="red">Hero raises to $2.00</font>, SB folds, <font color="red">BB raises to $7.00</font>, Hero calls $5.00

Flop: ($14.25) 5[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">BB bets $10.00</font>, Hero feels bad, that he called preflop ...

By the way, what kind of reraises do you call, if you feel that you can stake Villain ? When do you guys fold a middle pair ?