Help me play this better and explain why to me please.

[Godfather80]

Villain in CO this hand was an unknown with only 7 hands played before this one. Button's preflop cold call of Villain's preflop raise made me very reluctant to bet out on the flop. Then, when button folded to Villain's 1/2 pot sized bet didn't know what to do. Of course, I made the worst decision of the three.

Texas Hold'em $0.25-$0.25 NL (real money), hand #1,433,747,686

Seat 1: xphaktor ($27.05 in chips)
Seat 2: bank33 ($30.85 in chips)
Seat 3: Syster Yster ($37.90 in chips)
Seat 4: poisonivey24 ($22.05 in chips)
Seat 5: RAM-WAR ($24.35 in chips)
Seat 6: Hero J[img]/images/graemlins/diamond.gif[/img],J[img]/images/graemlins/club.gif[/img] ($23.75 in chips)
Seat 7: Falukropp ($35.70 in chips)
Seat 8: spinnfinnen ($21.50 in chips)
Seat 9: semridge07 ($13.85 in chips)
Seat 10: jools84 ($13.85 in chips)

ANTES/BLINDS
jools84 posts blind ($0.15), xphaktor posts blind ($0.25), spinnfinnen posts blind ($0.25).

PRE-FLOP
bank33 folds, Syster Yster calls $0.25, poisonivey24 folds, RAM-WAR folds, Hero bets $1.50, Falukropp folds, spinnfinnen bets $2.50, semridge07 calls $2.75, jools84 folds, xphaktor folds, Syster Yster folds, Hero calls $1.25.

FLOP ($8.85) T[img]/images/graemlins/diamond.gif[/img]7[img]/images/graemlins/diamond.gif[/img]4[img]/images/graemlins/club.gif[/img]
Hero checks, spinnfinnen bets $4.50, semridge07 folds, Hero calls $4.50.

TURN ($17.85) T[img]/images/graemlins/diamond.gif[/img]7[img]/images/graemlins/diamond.gif[/img]4[img]/images/graemlins/club.gif[/img]9[img]/images/graemlins/spade.gif[/img]
Hero checks, spinnfinnen bets $14.25 and is all-in, Hero ?