LMR: So many friends
This collection deserves special mention: your collection of friends.
You may have noticed a pop-up menu when you hover your mouse cursor over a member's user name.
When you click that link, the user is added to your "collection of friends". The other person does not need to "collect you back". He is on your list anyway. Check the usual link for your collections.
Now use your friends-list to keep track of their posts. The "Unread Posts" list has a tab that shows only pages by your friends. A post will appear on the list every time someone replied to that post. Whether the reply came from one of friends or someone else.
Find out who befriended who. Visit someone else's profile and hit Collection -> Friends. This is a quick way of expanding your own collections. Friends or otherwise.