How to pick up item by pressing "E" when cursor is on item

I have a function which picks up item but it does it whenever my cursor is and I want to make it only pickable when cursor is on it

void Update()
{

if (Input.GetKeyUp(KeyCode.E))
{
GetComponent<Rigidbody>().useGravity = false;
this.transform.position = theDest.position;
this.transform.parent = GameObject.Find("Destination").transform;
}
}

 

try..

Code (CSharp):

1. if (Input.GetKeyUp(KeyCode.E))
2. {
3.   if ((Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out RaycastHit hit)) && (hit.transform == transform))
4.   {
5.     GetComponent<Rigidbody>().useGravity = false;
6.     transform.position = theDest.position;
7.     transform.parent = GameObject.Find("Destination").transform;
8.   }
9. }

 

Thank you