How to Have the Navigation Links Show Next to Each Other?

I’m building a template, and when I go into Appearance -> Menus and add menu links to the menu, then the menu links will show up or be formatted on top of each other like a list and not next to each other how I would like to have it.

Any suggestions how I can make the navigation links show next to each other in a horizontal line?

This is the code for my navigation:

<nav>
	<div>
			<h3 id='blog_navi'><?php wp_nav_menu(array( 'theme_location' => 'primary-menu')); ?></h3>
	</div>
	</nav>