Trip Aces OOP, flush draw on board

[Truja]

BetFair Poker No-Limit Hold'em, $0.20 BB (6-max)

UTG ($6.35)
MP ($10.05)
CO ($10)
Button ($6.50)
Hero ($7.75)
BB ($5.39)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls $0.20, MP calls $0.20, CO checks, <font color="#666666">1 fold</font>, Hero calls $0.10, BB checks.

Flop: ($1.00) 2[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets $1</font>, <font color="#666666">2 folds</font>, MP calls $1, <font color="#666666">1 fold</font>.

Turn: ($3) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3</font>, MP calls $3.

River: ($9) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets $2.70</font>

End of the hand, and a few comments in white below:
/
|<font color="white"> Hero folds</font>
|<font color="white"> Final Pot: $9</font> <font color="white"> </font>
| <font color="white">Comments: I think the first mistake was not raising preflop, though probably someone</font>
| <font color="white">would've called and I would've been OOT all the hand.</font>
| <font color="white">I think my biggest mistake was not going all-in in the turn being OOT, and that lead</font>
| <font color="white">to the river situation.</font>
\
So, what do you think??