Moving grabbed object OnTriggerStay2D

Hi everyone! I got problem. I wrote C# script attached to box. I want to let player grab and move it when left CTRL is hold and release when isnt. I got code like below but player grab box and don't want release... Can anyone help me ? I got code like this:

 void OnTriggerStay2D(Collider2D col)
     {
         if (col.gameObject.tag == "Player")
         {
             if (!movingObject)
             {
                 if (Input.GetKey(KeyCode.LeftControl))
                 {
                     this.gameObject.transform.parent = Player.transform;
                     movingObject = true;
                 }
             }
             else if (movingObject)
             {
                 if (!Input.GetKey(KeyCode.LeftControl))
                 {
                     this.gameObject.transform.parent = null;
                     movingObject = false;
                 }
             }
 
         }
     }