Find your conversations with him

Enter your Discord username to see the messages of his you reacted to or replied to, messages of yours he reacted to, and any quotes where he tagged you.

This is your Discord username, not your display name or server nickname — all lowercase, no spaces, no "@". Find it on your profile card in Discord (tap your name/avatar, it's listed under "Username") or in Settings → My Account. Example: xyzzyblue.