Top pair + Flush draw

This hand has no real read, his stats are 80/0 after 10 hands...This is probably pretty bad, please help.

Party Poker No-Limit Hold'em, $ Hero (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($2.19)
MP ($111.95)
CO ($0)
Button ($33.65)
SB ($48.40)
Hero ($50)

Preflop: Hero is BB with 5http://www.flopturnriver.com/phpBB2/...iles/spade.gif, Ahttp://www.flopturnriver.com/phpBB2/...iles/spade.gif. SB posts a blind of $0.25.
2 folds, Button calls $0.50, 1 fold, Hero checks.

Flop: ($1.25) Khttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, 8http://www.flopturnriver.com/phpBB2/...iles/spade.gif, Ahttp://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players)
Hero bets $1, Button raises to $2, Hero raises to $4, Button calls $2.

Turn: ($9.25) 6http://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players)
Hero bets $5, Button calls $5.

River: ($19.25) Jhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (3 players)
Hero checks, Button bets $11.39, Hero folds.

Final Pot: $30.64

I think you could have played this differently. This is a great hand to flop. 14 Outs -- That makes you a slight favorite to win the hand with 2 cards to come (With a flush, 2 pair, trips, etc). My normal line is to push all in on the flop if he re-raises me. Have him make the descision.