The gui disappears when i let go

Ive made a script so when i click an object like an npc i can talk to it with different responses but when i go to touch the responses the GUI goes i would like it so when i let go, The GUI stays till i press the close button :). Any help would be greatly appreciated

  var target : Transform;
 
 function OnGUI () {
 ///making a varible i named it position it has to hav a lowercase first letter ive made it equal to a 2d position space by putting Vector2 and the (x,y) is the place im ref    var position = Vector2(0,0);
 /// mr cubies position is (x = 6.14779,y = 1)
 
 
    var screenPosX : Vector3 = camera.WorldToScreenPoint (target.position);
     print ("target is " + screenPosX.x + " pixels from the left");      
           
         for (var touch : Touch in Input.touches) {
         if (touch.phase == TouchPhase.Stationary) { 
     
     
     var touchPositionXRounded = Mathf.Round(touch.position.x / 100);
     var touchPositionYRounded = Mathf.Round(touch.position.y / 100);
   // screen position of gameobject  
      var screenPosY : Vector3 = camera.WorldToScreenPoint (target.position);
          print ("target is " + screenPosY.y + " pixels from the top");
     
     var oSPX = Mathf.Round(screenPosX.x / 100);
     var oSPY = Mathf.Round(screenPosY.y / 100);
         
     
 
 ///        Debug.Log(touch.position);
         Debug.Log(touchPositionXRounded);
         Debug.Log(touchPositionYRounded);
         Debug.Log(oSPX);
         Debug.Log(oSPY);
 // if touch position = the touch position of game object display a gui box
         if (touchPositionXRounded ==  oSPX){
         if (touchPositionYRounded ==  oSPY) {
         
         GUI.Box(Rect(10,10,100,90),"Hello");
         if (GUI.Button(Rect(10,80,100,90),"Close")) {
            touch == false;
         }
 // if you click the button it displays a gui text box over the old one        
         if (GUI.Button(Rect(120,10,150,40),"Hi")){ 
             GUI.Box(Rect(10,10,100,90),"Hello");
         
         }
         
         if (GUI.Button(Rect(120,60,150,40),"Go away!")){
             GUI.Box(Rect(10,10,100,90),"fine then moody :(");
         
         }
        
        
        }
     }
   }
 }
 }

EDIT i added a boolean but still does not work :(

 #pragma strict
 
 var show :  boolean;
 var show2 : boolean;
 var target : Transform;
 
    var screenPosX : Vector3 = camera.WorldToScreenPoint (target.position);
     print ("target is " + screenPosX.x + " pixels from the left");      
    var screenPosY : Vector3 = camera.WorldToScreenPoint (target.position);
     print ("target is " + screenPosY.y + " pixels from the top");
     
   // screen position of gameobject  
    
     var oSPX = Mathf.Round(screenPosX.x / 100);
     var oSPY = Mathf.Round(screenPosY.y / 100);
 if(show2 === true);
 {
   
 }
 function Update () {
  
  for (var touch : Touch in Input.touches) {
  if (touch.phase == TouchPhase.Began) {
  show = true;
  Debug.Log("niceballsTrue");
  Debug.Log(show);
     
     var touchPositionXRounded = Mathf.Round(touch.position.x / 100);
     var touchPositionYRounded = Mathf.Round(touch.position.y / 100);
 }
 else
 {
  show = false;
   Debug.Log("False");
   Debug.Log(show);
 }
 
 
 
 
 if(show === true)
 {
    Debug.Log("OMG IT WORKSish");
 }
 else if (touchPositionXRounded == oSPX) 
 {
    if (touchPositionYRounded ==  oSPY) {
         show2 = true;
        }
    Debug.Log("ITS ALIVE":)
 }
 else
 {
    Debug.Log("printed false :(");
   }
  }
 }