Should I have punked out?

Knew I was sandwiched, but with 4:1 on the NF draw, I couldn't let it go on the AI to my right... which then made me feel pot committed for the AI on my left. Should I have just said "fuck it" from the beginning?

BTW... UB HH is jacked again. After I call MP2s AI, SB pushes. Of course I donkaliciously call that 'cause I'm really feeling the heart on the River.....

Ultimate Bet No-Limit Hold'em, $.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

UTG+1 ($38.57)
MP1 ($8.61)
MP2 ($4.07)
MP3 ($1.92)
CO ($4.39)
Hero ($18.68)
SB ($7.60)
BB ($13.29)
UTG ($18.36)

Preflop: Hero is Button with http://www.flopturnriver.com/phpBB2/.../smiles/jh.gif, http://www.flopturnriver.com/phpBB2/.../smiles/ah.gif.
3 folds, MP2 calls $0.10, 1 fold, CO calls $0.10, Hero raises to $0.5, SB calls $0.45, 1 fold, MP2 calls $0.40, CO folds.

Flop: ($1.70) http://www.flopturnriver.com/phpBB2/.../smiles/9h.gif, http://www.flopturnriver.com/phpBB2/.../smiles/4c.gif, http://www.flopturnriver.com/phpBB2/.../smiles/2c.gif (3 players)
SB checks, MP2 bets $0.2, Hero raises to $0.7, SB calls $0.70, MP2 calls $0.50.

Turn: ($3.80) http://www.flopturnriver.com/phpBB2/.../smiles/8h.gif (3 players)
SB checks, MP2 bets $2.87 (All-In), Hero calls $2.87, SB calls $2.87, Hero calls $0.

River: ($0) http://www.flopturnriver.com/phpBB2/.../smiles/td.gif (3 players, 1 all-in)

Final Pot: $12.41