bootstrap grid with blank form-group col-md-6 - html

Question

I'd like to achieve a grid like down below. There's a problem because I've got form-group as well. And the problem is, col-md-6 before last and the last one doesn't align correctly.
<form action="">
<div class="col-md-1 pull-right text-right padding-right-0">
<div class="action-buttons">
<a href="#" class="pull-right button-edit-content" data-target="#s3">
<i class="fa fa-pencil" aria-hidden="true"></i>
</a>
</div>
</div>
<div class="form-group col-md-6">
<label for="">label_1</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<label for="">label_2</label>
<input type="text">
</div>
<div class="form-group col-md-6">
<label for="">label_3</label>
<input type="text">
</div>
<div class="form-group col-md-5">
</div>
<div class="form-group col-md-6">
<label for="">label_5</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<label for="">label_6</label>
<input type="text">
</div>
</form>

Answer 1

Try wrapping them in row, like
<div class="row">
<div class="form-group col-md-6">
<label for="">label_1</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<label for="">label_2</label>
<input type="text">
</div>
</div>
<div class="row">
<div class="form-group col-md-6">
<label for="">label_3</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<div> </div>
</div>
</div>

Answer 2

I think I see what you're trying to do. I think the problem is the empty column which doesn't have a comparable height to the others.
I'd suggest removing that empty column and clearing the left of the following one by adding a class to it as in this fiddle: https://jsfiddle.net/vv807bax/
CSS:
.clearleft {
clear: left;
}
HTML:
<div class="container">
<div class="row">
<form action="">
<div class="col-md-1 pull-right text-right padding-right-0">
<div class="action-buttons">
<a href="#" class="pull-right button-edit-content" data-target="#s3">
<i class="fa fa-pencil" aria-hidden="true"></i>
</a>
</div>
</div>
<div class="form-group col-md-6">
<label for="">label_1</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<label for="">label_2</label>
<input type="text">
</div>
<div class="form-group col-md-6">
<label for="">label_3</label>
<input type="text">
</div>
<div class="form-group col-md-6 clearleft">
<label for="">label_5</label>
<input type="text">
</div>
<div class="form-group col-md-5">
<label for="">label_6</label>
<input type="text">
</div>
</form>
</div>
</div>