Hi Ifonly,
Welcome to the PTSD Forum. I can relate to the "comforting and scary" description, as I found my emotions mixed when I first joined. But as you continue to read and post, you will find the scary part diminishes. This site is great for both the information and the support of the other members.
Take you time, look around and post as you feel the need.
Wishing you peace.
Debbie