could you have put him on this hand

UB PLO 25$ 10 players
Hero is BB (8 [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/diamond.gif[/img]2 [img]/images/graemlins/diamond.gif[/img]10 [img]/images/graemlins/club.gif[/img])
three limpers including villan on the button
hero checks option
flop: A [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/club.gif[/img]
SB checks, Hero bets pot, fold,fold, Villan calls & SB folds. 2 players
(no idea how villan plays but assume he is on a flush draw.)
turn: 6 [img]/images/graemlins/diamond.gif[/img]
Hero bets 3/4 pot & Villan calls
river: 7 [img]/images/graemlins/diamond.gif[/img]
(I am very confident i have the best hand here & the game is very loose as I have seen players call pot size bets on the river with all kinds of junk like 2pair with busted flush draws& low end straights on paired boards)
Hero bets pot to put villan all in...
RESULTS BELOW








<font color="white"> </font> Villan calls all in &amp; shows AAxx for bigger boat.Could I have put him on AA when he didnt raise preflop or on the flop with top set? Did i overplay my hand? <font color="white"> </font>