What to do when villains draw peeks at you.

When villains line looks alot like a draw, what do I do when an obvious draw hits when I'm OOP? Say pot is decent sized pot and it's the river, and we've both got pretty deep stacks. If I v-bet 3/4pot or more, I can't call a shove(in this scenario) If I check, it's pretty obvious I'm afraid of the draw.

Not to sound like a broken record, but how about betting a different amount?

I guess that should really be my question. How much?

If he's likely to have had the draw, then 1/2 pot and fold is good. If he's very likely to have had the draw, then c/f is better.