There isn't a Friends' List on this site, unfortunately. ._.
However, this might as well be a suggestion to have one on the forum. Though technically speaking all the well-known people here know each other left and right and we're already deep friends anyway.
The only reason why I would see Blizzard against having an implementation of a Friends' List would be that RMRK, the forum Blizzard has left, had a Friends' List and Chaos-Project is not an RMRK clone. See what happens though.