He was new to the table but I just knew we were splitting at worst so might as well let him bluff off his stack. Comments?

Party Poker No-Limit Hold'em, $0.5 BB (9 handed)

MP3 ($93.5)
CO ($54.1)
Button ($44.32)
SB ($105.62)
BB ($20.81)
Hero ($50)
UTG+1 ($94.7)
MP1 ($19.7)
MP2 ($49.25)

Preflop: Hero is UTG with , .
Hero raises to $2, 5 folds, Button calls $2, 2 folds.

Flop: ($4.75) , , (2 players)
Hero bets $4, Button calls $4.

Turn: ($12.75) (2 players)
Hero bets $10, Button calls $10.

River: ($32.75) (2 players)
Hero checks, Button bets $28.32 (All-In), Hero calls $28.32.

Final Pot: $89.39

Results in white below:
Hero has Ah Qh (two pair, aces and fives).
Button has Jc Tc (one pair, fives).
Outcome: Hero wins $89.39.

what the hell was he doing calling the flop or the turn?

Was he chasing the straight thinking you didn't have over cards that had already paired? Oh well, g1 for you!