To see who added you on Snapchat, open your "Added Me" list via the Snapchat home screen, or tap on your Friends list.
You can pin someone's conversation on Snapchat so they'll always appear at the top of your Chat page.
One way is to go to the “Add Friends” page. Here, scroll down to the Quick Add section, and you can see that Snapchat will suggest users here and often shows an approximate number like “3+ Mutual ...
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