Retarded play?

Had been running well on this table and now the loose-passive players are now folding lots.

Still, is this a bad line?

Prima Poker skin
No Limit Holdem Ring game
Blinds: $0.05/$0.10
6 players
Converter

Stack sizes:
UTG: $2.45
UTG+1: $5.35
CO: $7.17
Button: $3.65
SB: $1.95
Hero: $15.25

Pre-flop: (6 players) Hero is BB with T:spade: 6:spade:
UTG raises to $0.2, 2 folds, Button calls, SB folds, Hero calls.

Flop: 6:heart: J:spade: A:spade: ($0.65, 3 players)
Hero checks, UTG bets $0.4, Button calls, Hero raises to $1.6, UTG calls, Button folds.

Turn: 4:spade: ($4.25, 2 players)
Hero checks, UTG checks.

River: 2:diamond: ($4.25, 2 players)
Hero bets $3.5, UTG calls all-in $0.65.
Uncalled bets: $2.85 returned to Hero.

Hadn't noticed that it was the even-shorter stack who had called... my bad...

Results:
Final pot: $5.55

You need to be looking at stack sizes before you raise. Given those I dont think we can make that raise simply because we are basically still on a draw unless we think our pair of 6s is good enough. If you think you can stack him [shouldnt be hard] if you hit two pair or a flush then simply call the flop bet. As played bet the turn, he only has $0.65 left and the pot is $4.25

I also think that you raised a little too much on the draw. But it really depends how he was playing. If he was super tight and you're playing loose, then a bet like that might work to steal the pot.

You also have to be careful. When people are deep into their stacks, they're more likely to push or call weak hands, so you should be cautious when you're trying to make draws against a low-stacked player.