welcome to beyond blue.
Quirky has a made a good response. The one thing I wanted to add relates to your child, and you have to know that I when I write this I am writing this as myself, and another person I know in a similar position.... There are some people who whenever they meet you will ask you how you are and then ask "really?" as though I might be fibbing. Multiply that by N people, and sometimes you just want to be treated normally - whatever that is. Don't get me wrong, it is nice that people ask, but if you are made to second guess then it gets a bit much.
Perhaps the best thing I can think of would be if he had a note on his phone that reminded him that he can speak to you whenever he needs to and know that you will listen and respond with compassion. Some links to help you are here...
If you have any questions....