How can I get the distance from the center of an object to the mouse position?

So basically, I have a sprite and I need to set the size.x of it to the distance to the mouse. all fine and dandy until I move the mouse above the object, and now it's getting shorter... Any help is much appreciated!

like so: https://youtu.be/6GRJ8iU1gWk

and t$$anonymous$$s is my PlayerController.cs: (I kinda know the problem is that im setting the sprite size to the distanceFromMouse.x, but I have no idea how I could fix it)

 public class PlayerController : MonoBehaviour
 {
     [Header("Aiming")]
     [SerializeField] private GameObject rotatePoint;
     [SerializeField] private Transform aimIndicator;
 
     [Header("Shooting")] 
     [SerializeField] private float strengthThreshold;
     [SerializeField] private float shootStrength;
 
     [Header("Movement")]
     [SerializeField] private float _moveSpeed;
     
     private Vector3 _mousePosition;
     private Vector3 _distanceFromMouse;
     
     private float _horizontalInput;
 
     private SpriteRenderer _aimSprite;
     private Camera _mainCam;
     private Rigidbody2D _playerRb;
 
     bool isMoving;
 
     private void Start()
     {
         _mainCam = Camera.main;
         _aimSprite = aimIndicator.GetComponent<SpriteRenderer>();
         _playerRb = GetComponent<Rigidbody2D>();
     }
     
     
     
     private void Update()
     {
         GetMousePosition();
         AimTowardsMousePosition();
         DrawLineTowardsMouse();
         GetUserInput();
         CheckPlayerMovement();
 
         aimIndicator.gameObject.SetActive(!isMoving);
     }
 
 
     private void FixedUpdate()
     {
         MovePlayer();
     }
 
 
     void GetUserInput()
     {
         _horizontalInput = Input.GetAxis("Horizontal");
     }
 
 
     bool CheckPlayerMovement()
     {
         isMoving = _horizontalInput != 0;
 
         return isMoving;
     }
 
 
     void MovePlayer()
     {
         _playerRb.velocity = new Vector2(_horizontalInput * _moveSpeed,_playerRb.velocity.y);
     }
     
     
     
     void GetMousePosition()
     {
         _mousePosition = _mainCam.ScreenToWorldPoint(Input.mousePosition);
         // Debug.Log(_mousePosition);
     }
 
     void AimTowardsMousePosition()
     {
         // Get the distance between _rotatePoint and the _mousePosition 
         _distanceFromMouse = _mousePosition - rotatePoint.transform.position;
         Vector2 normalisedDistance = _distanceFromMouse.normalized;
         
         // Get angle from mouse location and rotate point location
         float zAngle = Mathf.Atan2(normalisedDistance.y, normalisedDistance.x) * Mathf.Rad2Deg;
         rotatePoint.transform.rotation = Quaternion.Euler(0,0,zAngle); // Rotate _rotatePoint.
     }
 
     void DrawLineTowardsMouse()
     {
         _aimSprite.size = new Vector2(Mathf.Abs(_distanceFromMouse.x), 1);
         
         if (_aimSprite.size.x < 1)
         {
             _aimSprite.size = new Vector2(1, 1);
         }else if (_aimSprite.size.x > strengthThreshold)
         {
             _aimSprite.size = new Vector2(strengthThreshold, 1);
         }
     }
 }