double belly buster played too weak???

UB 3/6... (6 handed) i think i misplayed on several levels
hero in bb with :8 [img]/images/graemlins/diamond.gif[/img],7 [img]/images/graemlins/diamond.gif[/img]

my notes on villian at this point:
will limp w/ low unsuited 1 gappers any position
stubborn with middle pair weak kicker overcalling through river
check/calls strong draws in or out of position

preflop action...
villain calls utg, 3 folds, sb calls, hero checks (?)

flop comes: 3 sb's(for some reason suit symbols are sent to bottom now??)
Jh, 5d, 9s
sb checks,hero checks, villain bets, sb folds,hero calls (?)

turn comes: (2.5 bb)
3h
hero checks, villain bets, hero calls

river comes: (3.5 bb)
Qs
hero checks, villain checks

i really need to improve my play w/ head to head draws out of position, and in the 6/7 hand range so i dug this guy up for some feedback...

any line suggestions would be appreciated... i realize i played my 8 outer very very weakly...