You don't want to listen for the click all the time that is so wrong. you have to bind and unbind based on the navbar status. here is my navbar-colapse and it's id is 'z', and when it is open i will listen for clicks and when it's closed i don't listen anymore. i will put comment on the code:
    //CALLBACK AFTER NAVBAR-COLLAPSE OPEN
    $('#z').on('shown.bs.collapse', function () {
        // HERE WE BIND THE CLICK TO THE HANDLER FUNCTION
        $(document).bind( "click", handler );
    })
    //CALLBACK AFTER NAVBAR-COLLAPSE CLOSE
    $('#z').on('hidden.bs.collapse', function () {
        // SINCE THE NAVBAR IS CLOSED WE DONT NEED TO LISTEN FOR CLICKS           ANYMORE
        $(document).unbind( "click", handler );
    })
    //THIS IS THE FUNCTION THAT GET FIRED
    var handler = function() {
        //LISTEN FOR CLICKS
        $(document).click(function(event) {
            //HERE FORM-CONTROL IS MY SEARCH BOX IN THE NAV SO I DONT WANT TO CLOSE
            //THE NAVBAAR IF THEY CLICK ON FONT-CONTROL, BUT ANYTHING BESIDE THAT WE CLOSE THE NAVBAR
            if (!$(event.target).hasClass("form-control")) {
                $('#z').collapse('hide');
            }
        });
    };  
Also here is my nav-bar code :)
            <nav class="navbar navbar-default my-nav" data-spy="affix" id="nav" style="margin-bottom: 0">
            <div class="container-fluid">
                <div class="navbar-header">
                    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#z" aria-expanded="false">
                        <span class="sr-only">Toggle navigation</span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                    </button>
                    <a class="navbar-brand" href="#">-</a>
                </div>
                <!-- Collect the nav links, forms, and other content for toggling -->
                <div class="collapse navbar-collapse" id="z">
                    <div class="navbar-form navbar-left my-navbar-left" role="search">
                        <div class="form-group">
                          <input id="searchbar" type="text" class="form-control" placeholder="Search for ads">
                        </div>
                    </div>
                    <ul class="nav navbar-nav navbar-right my-navbar-right">
                        <li><a class="tab-c tab-home"> <span class="text-to-icon">Posts</span> </a></li>
                    </ul>
                </div><!-- /.navbar-collapse -->
            </div><!-- /.container-fluid -->
        </nav>