On Snapchat, it is possible to see the list of friends you contact most often on the app.
Steps

Step 1. Open Snapchat
This is the application whose icon represents a white ghost on a yellow background.
- If you are not logged in, press Log in then enter your username (or email address) and password.

Step 2. Slide your finger down the photo screen
This action will open your profile page.

Step 3. Select My Friends
This is the last option at the bottom of this page.

Step 4. Review the Best Friends section
This section is at the very top of the page My friends, just above the header My friends. All the people listed under the heading Best friends and before the header My friends are some of your best friends on Snapchat.