How should I think about this?

[Skuzzy]

All stacks 100BB

Hero is button with 77

Loose player with FPS raises $4 from EP
average player calls in MP
hero calls
BB calls

Flop 2 [img]/images/graemlins/diamond.gif[/img] T [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/diamond.gif[/img] ($17)

BB checks, EP checks, MP bets $5, Hero ?

I hate this spot - its one i always have trouble with. I have a marginal made hand given the flop. The small bet could indicate a weaker pair but more likely is a draw. I don't want to be building a pot with so few outs. So do I call it down and hope no diamond hits? I hate being weak when I think I'm ahead. What should my standard line be here?