Is there currently a way to see everyone you have become friends with?

If you go to your Private Messages you will see 6 tabs along the top. The last one is labeled "contacts". This tab shows the list of people that you have sent a friend request to who has agreed. There is nowhere to see who you have agreed to be friends with, though. Someone requesting you as a friend and you requesting that person as a friend are two different things. If you want to be mutual friends with someone, you both have to send a request to the other, then both accept.

As an aside, at the bottom of that tab there is a small dropdown menu. The last item on there is 'blocked'. Here you can see anyone that you have blocked from being able to message you (and have the option to unblock them if you want - important if you block someone's messages by accident)

Perfect, thank you!