$1/2 - AK with TPTK with draws out there - how to protect hand?

[hammerva]

Poker Stars
Limit Holdem Ring game
Limit: $1/$2
10 players
Converter

Stack sizes:
Hero: $65
UTG+1: $17.75
UTG+2: $31
MP1: $20
MP2: $35
MP3: $27.50
CO: $17.25
Button: $83.50
SB: $48.50
BB: $57.25

Pre-flop: (10 players) Hero is UTG with K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises</font>, 8 folds, BB calls.

Flop: A[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] (4.5SB, 2 players)
<font color="#cc0000">BB bets</font>, Hero calls.

Turn: 4[img]/images/graemlins/spade.gif[/img] (3.25BB, 2 players)
<font color="#cc0000">BB bets</font>, <font color="#cc0000">Hero raises</font>, BB calls.

River: 2[img]/images/graemlins/heart.gif[/img] (7.25BB, 2 players)
<font color="#cc0000">BB bets</font>, Hero ??

I think you can pretty much figure what happened. I guess my question is how do you protect your hand against a tight aggressive player with plenty of draws out there. Looking back I should have raised on the flop as well but I don't think it would change the situation. I guess I wanted him in the hand and get the most out of this which is such stupid play obvivously. Could I have gotten a fold out of this? I guess the other question is should I fold or call and face the medicine? Obviously one of the weakness in my play is not folding enough when losing but if I fold all the time I am too weak according to everyone.

Thanks