3bet pot with 88 vs aggro villain

[fullcontact]

Titan No-Limit Hold'em, $0.50/$1.00 (Titan HH Converter by Kreatief)

CO ($102.10)
Button ($91.35) (Hero)
SB ($107.00)
BB ($90.90)
MP3 ($342.02)

Preflop: Hero is Button with 8[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img]
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to 4.0</font>, <font color="#CC3333">SB raises to 12.5</font>, <font color="#666666">1 folds</font>, Hero calls $8.50,

Flop: 6[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] ( $26 )
<font color="#CC3333">SB bets $21.00</font>,

he is very aggressiv and he has been 3-betting me pretty often recently. ( 26 / 17 )
whats my plan?

[spivey]

Shove.

[Sorcerer808]

I don't think you can make a big mistake here, both shoving or getting it in on turn are good imo.

[sh58]

shove