Set versus possibel flush

Poker Stars, $0.02/$0.05 No Limit Hold'em Cash, 5 Players

BTN: $5.55 (111 bb)
SB: $10 (200 bb)
Hero (BB): $5 (100 bb)
MP: $12.31 (246.2 bb)
CO: $0.52 (10.4 bb)

Preflop: Hero is BB with 3 3
2 folds, BTN calls $0.05, SB folds, Hero checks

Flop: ($0.12) 2 T 3 (2 players)
Hero checks, BTN bets $0.20, Hero raises to $0.40, BTN calls $0.20

Turn: ($0.92) J (2 players)
Hero bets $0.52, BTN raises to $1.65, Hero calls $1.13

River: ($4.22) 5 (2 players)
Hero checks, BTN bets $1.25, Hero ?

Ok the Flop raise was to small, but i am not sure on the Turn, and the River is an easy fold ?

Think about the pot odds you're offering him with the check/minraise and how that compares with equity some of his draws have on the flop. Then figure out what line and bet sizing will let you get all in by the river.

Fold river since he nearly always has a flush.

Unless you know that this guy likes to steal tiny pots with air just bet the flop. If he has a T he'll continue and you make easy money and if he as a draw you're making him pay.

As played, you really do need to make that flop raise bigger. Turn raises tend to mean they have the goods (unless you have notes on this guy turn-raising lightly). I'm an idiot that spews off money here, but I think the best play is fold.

don't c/r flop just because you can

Lead flop

Some info on BU would be helpful. If he is aggressive, wouldn't you expect him to iso with a lot of Axs types of hands?

He was new at the Table, but seems loose an passive.

when he overpots the flop you should raise a lot more, he either has a hand he likes an he is not folding or a NFD that he will call. so as a c/r i would go to 0.7$
when he calls flop and turn makes a flush you're pretty much beat cause FD are the most of his flop calling range, another set, 2pairs would go all-in on you.
on this board an vs this loose/passive opps as you say,turn i like c/f , c/c , b/f better then b/c because there is not much worse he can call when we bet and we always get raised by better . his raising range has us crushed in general on this line , while we have better equity vs his betting range when he bets if we check.
as played fold river always