Hi,
You are missing the most important feature of Bootstrap.
Bootstrap devide the screen verticaly into 12 sections. you have to group this sections depending on your need.
<div class="container">
<div class="row">
<div class="col-sm-2">
<!--
</div>
<div class="col-sm-8">
<!--
</div>
<div class="col-sm-2">
<!--
</div>
</div>
</div>
you can group sections however you like as long as the sum in the same row is 12.
Here is a fast&easy tutorial :
Bootstrap 3 Tutorial[
^]