Bootstrap 3 - Space between inputs with Icons and custom width - css

Question

I'm facing a problem I don't really know how to deal with.
I'm working on BootStrap 3 and i'm trying to make some inline forms because it is more user-friendly than a full vertical form (I don't want to scroll for ever)
I find some way to inline the normal inputs, but when it comes to the input with icons (font awesome), I can figure how to inline them, but they inline side to side without any space between them.
Also, I don't figure out how to change their width as I would do with normal input (col-sm-4 for example).
I would like the "Email" and "Telephone" to be scaped and to change their width
Please have a look at my code and the following image explaining it:
http://www.bootply.com/T8w3oRE3Sn

Answer 1

You were missing few things in the form group so I have wrapped things up. Hope it will help you :)
Below is the working snippet:
.myform .form-inline .input-group .input-group-addon{ width:20px;}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="row myform">
<div class="col-xs-12">
<form name="myform" role="form" novalidate>
<div class="form-inline ">
<div class="form-group col-xs-6">
<div class="input-group col-xs-12">
<span class="input-group-addon"><i class="fa fa-envelope"></i></span>
<input type="email" class="form-control" placeholder="Email de l'interlocuteur">
</div>
</div>
<div class="form-group col-xs-6">
<div class="input-group col-xs-12">
<span class="input-group-addon"><i class="fa fa-phone"></i></span>
<input type="email" class="form-control" placeholder="Téléphone de l'interlocuteur">
</div>
</div>
</div>
</form>
</div>
</div>

Answer 2

Try this
IF you see it in large screen it will be inline.
You have to use form-inline class to make form inline.
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="container">
<form class="form-inline">
<div class="form-group">
<label for="email">Email:</label>
<input type="email" class="form-control" id="email" placeholder="Enter email">
</div>
<div class="form-group">
<label for="pwd">Password:</label>
<input type="password" class="form-control" id="pwd" placeholder="Enter password">
</div>
<div class="checkbox">
<label><input type="checkbox"> Remember me</label>
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>

Answer 3

You just need to deal with good understanding of bootstrap grid system
<div class="form-group row">
<label for="inputEmail3" class="col-sm-1 control-label">Interlocuteur</label>
<div class="col-sm-2">
<input type="text" class="form-control" id="inputEmail3">
</div>
<label for="inputEmail5" class="col-sm-1 control-label">Poste</label>
<div class="col-sm-2">
<input type="text" class="form-control" id="inputEmail5" placeholder="DeInterlocuteur">
</div>