PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: ITH Forums)

UTG (t1500)
UTG+1 (t1400)
MP1 (t1450)
MP2 (t1440)
MP3 (t4820)
CO (t3210)
Button (t1260)
Bagonirix (t1480)
BB (t1760)

Preflop: Bagonirix is SB with , .
1 fold, UTG+1 calls t20, 3 folds, CO calls t20, Button calls t20, Bagonirix completes, BB checks.

Flop: (t100) , , (5 players)
Bagonirix checks, BB checks, UTG+1 checks, CO bets t20, Button calls t20, Bagonirix calls t20, BB folds, UTG+1 calls t20.

Turn: (t180) (4 players)
Bagonirix checks, UTG+1 checks, CO bets t20, Button raises to t40, Bagonirix calls t40, UTG+1 calls t40, CO calls t20.

River: (t340) (4 players)
Bagonirix bets t300, UTG+1 folds, CO folds, Button raises to t600, Bagonirix raises to t1400, Button calls t580 (All-In).

Final Pot: t2920
Main Pot: t2700 (t2700), between Button and Bagonirix. > Pot won by Button (t2700).
Pot 2: t220 (t220), returned to Bagonirix.

Results in white below:
Bagonirix has 8d 5s (three of a kind, fives).
Button has 3c 2c (straight, five high).
Outcome: Button wins t2700. Bagonirix wins t220.

I'm in the same tournament except I'm up to $7200

I bet out on the flop here especially with the straight draw on board. Your hand is too dangerous to slowplay, you do not want to be giving free cards here. You dont have the nuts on the flop either. If you had 44 or 45 then giving the free card is ok, since you letting someone hit their straight so you make money off them.

Dammit I got 12th.

Raise flop to $100. He'll probably still come along and you'll still lose...but at least get the $ when you get a solid hand.