NL 25 6-max: flush draw + gutshot, how agressive should I be?

[Marc Desjardins]

I'm just coming out of a bad downswing. I've been reading a lot here and watching videos on cardrunners. I read many Pokey post and I'm trying to play a little less agressive preflop. I limp small pocket pair in EP now instead of always raising. I'm also trying limping suited aces in EP instead of folding. Basically, I want to play more smaller pots and hope to hit big.

So, this brings me to this hand. Vilain is 36, 8, 1.69 in 75 hands. He started very loose, won some big pots by sucking out but he's been losing it all back and he plays tighter now.

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $3.25
BB: $24.15
Hero (UTG): $33.70
CO: $25.30
BTN: $27.25

Preflop: Hero is dealt A[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] (5 Players)
Hero calls $0.25, <font color="red">CO raises to $0.50</font>, BTN calls $0.50, SB calls $0.40, BB calls $0.25, Hero calls $0.25

Flop: ($2.50) 2[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (5 Players)
SB checks, BB checks, <font color="red">Hero bets $1.55</font>, <font color="red">CO raises to $3.10</font>, 3 folds, Hero...

I think one big leak I use to have was not pushing hard with multi-draws on the flop. But I still have a hard time pulling the trigger in those situations.

What's my line here and why?

Thanks in advance