These short captions for best friends (or even a caption for best friend in one word) can capture everything you need and want to say. Looking for the perfect post for your BFF? Use these 130+ best friend captions for Instagram to show love, laughter, and friendship with every pic. Post these best friend captions on Instagram. Pick from this list of funny, cute and short caption ideas to show your BFF some love. Looking for the best friends captions for Instagram? Here’s my favorite list of 350+ captions you can use to make better friendship posts.