[Closed] NL2 BSS - Set vs backdoor flush

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.01/$0.02 No-Limit Hold'em (9 handed)

Known players:
[tg]BU$2.95:///////;SB$2.08:///////;BB$1.34:///////;UTG1$1.40:///////;UTG2$3.00:///////;MP1$1.96:///////;MP2$2.06:///////;MP3(Hero)$2.27:///////;CO$0.84:///////;[/tg]

Preflop: Hero is MP3 with 8:d, 8:c.
UTG1 calls $0.02, 3 folds, Hero raises to $0.10, CO folds, BU calls $0.10, 2 folds, UTG1 calls $0.08.

Flop: ($0.33) T:h, 4:d, 8:s (3 players)
UTG1 checks, Hero bets $0.20, BU calls $0.20, UTG1 folds.

Turn: ($0.73) 5:s (2 players)
Hero bets $0.42, BU calls $0.42.

River: ($1.57) 2:s (2 players)
Hero bets $1.00, BU raises to $2.23(All-In), Hero calls $0.55(All-In).

Final Pot: $5.35.

Results follow:

Hero shows three of a kind, eights(8d 8c).
BU shows a flush, jack high(9s Js).

BU wins with a flush, jack high(9s Js).

Is it just bad beat or my weak river play. Fold to river 3bet or to call the shove because I have so little money left?
Thanks,