For loop, wrap every two posts in a div
{% assign current_page_posts = paginator.posts | size %}
{% if current_page_posts > 0 %}
<div>
<div>
{% for post in paginator.posts %}
{% if forloop.index == 1 %}
<a href="{{ post.url }}">{{ post.title }}</a>
{% endif %}
{% if forloop.index == 2 %}
<a href="{{ post.url }}">{{ post.title }}</a>
{% endif %}
{% endfor %}
</div>
{% if current_page_posts > 2 %}
<div>
{% for post in paginator.posts %}
{% if forloop.index == 3 %}
<a href="{{ post.url }}">{{ post.title }}</a>
{% endif %}
{% if forloop.index == 4 %}
<a href="{{ post.url }}">{{ post.title }}</a>
{% endif %}
{% endfor %}
</div>
{% endif %}
</div>
{% endif %}