88, How bad is this fold??

[danwan]

Bad preflopfold???

I have no read on my oponents.
I open-raises utg+1 with 88. Button reraises and small blind caps. I fold.
Flop: [ 5d, 2c, 8c ]
SB bets, button reraises, sb 3-bet and button call.
Turn: [ Ah ]
SB checks, button bets, sb calls.
River: [ Th ]
SB checks, button bets, sb calls.

Button shows [ Ad, Jh ] a pair of aces. And wins 12.5 BB
SB shows [ Kc, Kh ] a pair of kings.