Help with Hand Reading

[SodaSurfer]

This is my first hand at the table, and I have no previous background with the Villain. It's 9-player 0.02/0.05 NL.

BB (Hero): $6.00
UTG+2 (Villain): $4.83

Preflop: Hero is dealt Q[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (9 Players)
UTG and UTG+1 folds, Villain raises to 0.15. Everyone fold to BB. Hero Calls.

Since, I'm OOP, I wanted to see the flop before building a big pot.

Flop: 7[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/heart.gif[/img]
Hero Checks, Villain bets 0.20, Hero Raises to 0.90. Villain thinks for 20 secs and then calls. Pot is now $2.10.

I think Villain would have pushed or folded with AA or KK, so, I put him on (AJ or KJ), (AK or AQ), Heart Draw, or Set. Roughly in that order of probability. Also, if Villain had any of the Ace-heart draws or Jack-heart draws, I think he would have acted faster. Comments on this hand range, please.

Turn: 3[img]/images/graemlins/spade.gif[/img]
Pot is $2.10 and Villain has $3.78 remaining. Based on the range I put the Villain on, I decided to play this to the River.

Hero bets $2.00
Villain thinks a bit then calls.

Should I have bet the full $3.78 here, or bet less and hope for a raise? I wanted to get the Villain pot committed.

River: 3[img]/images/graemlins/heart.gif[/img]
Hero Bets $1.78
Villain Calls and is All In.

Villain mucks cards. The only cards I can think of the Villain having are Jack-x. Does anyone think the Villain could have stayed in the hand and called the river bet with an underpair, or something else?

Thanks