I never know how to play this. Generally, I fold in this situation. Should I call that flop bet, and if so, then what? Do you play this differently, is there a good way to play this differently, or do you just have to accept hands like this and move on?

Party Poker No-Limit Hold'em, $ Hero (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 ($62.70)
MP1 ($80.17)
MP2 ($24.45)
CO ($65.35)
Button ($17.20)
SB ($43)
Hero ($46.25)
UTG ($63.93)

Preflop: Hero is BB with 9, 9. SB posts a blind of $0.25.
4 folds, CO calls $0.50, Button calls $0.50, 1 fold, Hero raises to $2.25, CO calls $2.25, Button folds.

Flop: ($6.25) 2, 3, T (2 players)
Hero bets $4, CO raises to $8, Hero folds.

Final Pot: $18.25