There is a problem with some NPC script. Would you be able to help?

So, I made an NPC that follows you if you're touching a part. But when it stops getting touched, it waits about 30 seconds to stop following you. Here's the script:

part = game.Workspace.AttackPart
touched = false

part.Touched:Connect(function(hitPart)
	if hitPart.Parent:FindFirstChildOfClass("Humanoid") then
		touched = true
	end
end)
part.TouchEnded:Connect(function(hitPart)
	if hitPart.Parent:FindFirstChildOfClass("Humanoid") then
		touched = false
	end
end)

local larm = script.Parent:FindFirstChild("Left Arm")
local rarm = script.Parent:FindFirstChild("Right Arm")

function findNearestTorso(pos)
	local list = game.Workspace:children()
	local torso = nil
	local dist = 100
	local temp = nil
	local human = nil
	local temp2 = nil
	for x = 1, #list do
		temp2 = list[x]
		if (temp2.className == "Model") and (temp2 ~= script.Parent) and touched == true then
			temp = temp2:findFirstChild("HumanoidRootPart")
			human = temp2:findFirstChild("Humanoid")
			local nothuman = temp2:findFirstChild("NotHuman")
			if (temp ~= nil) and (human ~= nil) and (human.Health > 0) and (nothuman == nil) and touched == true then
				if (temp.Position - pos).magnitude < dist then
					torso = temp
					dist = (temp.Position - pos).magnitude
				end
			end
		end
	end
	return torso
end

while true do
	wait()
	local target = findNearestTorso(script.Parent.HumanoidRootPart.Position)
	if target ~= nil and touched == true then
		script.Parent.Humanoid:MoveTo(target.Position, target)
	end
end