Character is sliding?

I made a controller for a 2D character, but it slides, and seems to continuously add force in certain directions?

Help?

Reading input: private bool kJmp; private bool kUp; private bool kDwn; private bool Atk; private playerController iput; private float LR;

     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         iput = GetComponent<playerController> ();
         if (!kJmp) {
             kJmp = Input.GetKey (KeyCode.Space);
         } else {
 
             if (!kUp) {
                         kUp = Input.GetKeyDown (KeyCode.W);
                     }
           else {
             if (!kDwn) {
                             kDwn = Input.GetKeyDown (KeyCode.S);
                         }
           else {
             if (!Atk) {
                                 Atk = Input.GetKeyDown(KeyCode.X);
                     }
                 }
             }
         }
     }
 
     private void FixedUpdate () {
         LR = Input.GetAxis("Horizontal");
         iput.Move(kJmp, Atk, kUp, kDwn, LR);
             kJmp = false;
             Atk = false;
             kUp = false;
             kDwn = false;
             LR = 0.0f;

Applying the motion:

 public void Move(bool Jmp, bool Atk, bool Up, bool Down,float LR) {
 
         if (Jmp == true && jumping == false && Grounded == true) {
             jumping = true;
             rb.AddForce (new Vector2 (0, Jump_Force));
             jumping = false;
         } 
 
         if (Atk == true && Grounded == true) {
             Instantiate(Slash, Player.transform.position, Quaternion.identity);
             }
     
         if (Up == true && Grounded == true) {
                     print ("Looking up");
                     anim.SetInteger("Look", 1);
                 }
         else {
             if (Down == true && Grounded == true) {
                     anim.SetInteger("Look",-1);
                     }
                 }
 
         if (LR != 0){
             rb.velocity = new Vector2 (Speed * LR, rb.velocity.y);
         if (LR < 0){
             Facing = 1;
                     }
         else {
         if (LR > 0){
             Facing = -1;                                
                     }
         else {
         if (LR == 0){
             rb.velocity = new Vector2 (0,rb.velocity.y);
                     }
         else {
         if (LR != 0  && jumping == false && Grounded == true){
                     anim.SetBool("Moving",true);        
                         }
                     }
                 }
             }
         }
 
         Flip ();
         Jmp = false;
         Atk = false;
         Up = false;
         Down = false;
         LR = 0.0f;
     }