How would I "pickup" an item with a key? [ANSWERED]

my code:

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

local function pickup(key)
	if key == "f" then
		game.Players[player.Name]:WaitForChild("Hunger").Value = game.Players[player.Name]:WaitForChild("Hunger").Value -5
		script.Parent:Remove()
	end
end

mouse.KeyDown:connect(pickup)

I only want this to be able to activate when the player is standing near and is looking at the item, how would I do that? thanks