Hi Tanya,
It's not secret, just by invitation 🙂 Just go to groups and in the search bar look for "Buddies". It should come up. When you click on it, you'll get a message window for requesting an invitation. It's not done that way to keep anybody out, it's just that the creator of the group wanted control in case we started getting abusive people posting to it. It is meant as a support group more than a general interest group. Let me know if you can't find it.
Rob