Party Poker No-Limit Hold'em, $ Hero (8 handed) converter

MP2 ($15.17)
CO ($42.62)
Button ($6.05)
SB ($36.2)
Hero ($31.6)
UTG ($24.75)
UTG+1 ($5.25)
MP1 ($18.05)

Preflop: Hero is BB with A, K. SB posts a blind of $0.1.
2 folds, MP1 raises to $0.5, 1 fold, CO calls $0.50, 2 folds, Hero raises to $1.75, MP1 raises to $3.5, CO folds, Hero calls $1.50.

Flop: ($7.60) 7, 3, 8 (2 players)
Hero checks, MP1 bets $4, Hero folds.

Final Pot: $11.60

Goofing off at $25 NL... I think I should have put this guy all in preflop.
He showed 81/15 split. Not used to playing down here... what do you think?