NL $100, How to get away from top pair vs. sets?

Twice tonight I've doubled people up when they've hit sets against my top pair. Is there a different line I should be taking that might make it easier to not get reamed every time this happens?

In this hand, villain was loose and I thought there was a good chance he had a worse ace. I tried to represent QQ or something along those lines. I read his river bet as being weak.

PokerRoom No-Limit Hold'em, $1 BB (10 handed) converter

SB ($188.40)
Hero ($133.50)
UTG ($14.80)
UTG+1 ($87)
UTG+2 ($112)
MP1 ($55.10)
MP2 ($101.60)
MP3 ($21.10)
CO ($76.30)
Button ($86.40)

Preflop: Hero is BB with Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, MP1 calls $1, <font color="#666666">1 fold</font>, MP3 calls $1, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $5</font>, MP1 calls $4, MP3 calls $4.

Flop: ($15.50) A[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $8</font>, MP1 calls $8, MP3 folds.

Turn: ($31.50) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP1 bets $12</font>, Hero calls $12.

River: ($55.50) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP1 bets $8</font>, <font color="#CC3333">Hero raises to $30</font>, MP1 calls $22.

Final Pot: $115.50

Results:
Hero has Qs Ac (one pair, aces).
MP1 has 5c 5d (three of a kind, fives).
Outcome: MP1 wins $115.50.


In this hand (which caused every converter I put it into to time out, for some reason) the PF raiser was a LAG. Villain was sLP-P.

PokerRoom No-Limit Hold'em, $1 BB (10 handed)

SB ($89.50 in chips)
BB ($22.40 in chips)
UTG ($99 in chips)
UTG+1 ($100 in chips)
UTG+2 ($73 in chips)
MP1 ($47.10 in chips)
MP2 ($186.75 in chips)
MP3 ($71.40 in chips)
Hero ($105.70 in chips)
Button ($142 in chips)

PRE-FLOP
Hero is CO with A[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/spade.gif[/img]
2 folds, UTG+2 calls $1, MP1 calls $1, MP2 bets $2, 1 fold, Hero calls $2, 1 fold , SB calls $1.50, BB calls $1, UTG+2 calls $1, MP1 calls $1.

FLOP (Pot: $12) [board cards 6[img]/images/graemlins/heart.gif[/img],J[img]/images/graemlins/diamond.gif[/img],2[img]/images/graemlins/club.gif[/img] ]
SB checks, BB checks, UTG+2 checks, MP1 checks, MP2 checks, Hero bets $6, 3 folds, MP1 calls $6, 1 fold.

TURN (Pot: $24) [board cards 6[img]/images/graemlins/heart.gif[/img],J[img]/images/graemlins/diamond.gif[/img],2[img]/images/graemlins/club.gif[/img],7[img]/images/graemlins/heart.gif[/img] ]
MP1 checks, Hero bets $13, MP1 bets $39.10 and is all-in, Hero calls $26.10.

RIVER [board cards 6[img]/images/graemlins/heart.gif[/img],J[img]/images/graemlins/diamond.gif[/img],2[img]/images/graemlins/club.gif[/img],7[img]/images/graemlins/heart.gif[/img],8[img]/images/graemlins/spade.gif[/img] ]


SHOWDOWN
MP1 shows [ 6[img]/images/graemlins/spade.gif[/img],6[img]/images/graemlins/diamond.gif[/img] ]
Hero shows [ A[img]/images/graemlins/diamond.gif[/img],J[img]/images/graemlins/spade.gif[/img] ]
MP1 wins $100.20.