[Wonderland.]

Here is a site that gives good advice. Hope it helps.

I have GAD and I find it helpful for people to reassure me and take small steps along with me. Some times I find it hard to get out of the house and some reassurance and some company can get me out. Also someone telling you that you believe whatever anxiety challenge they are facing can help. Try and rationalise the irrational fears. Most importantly keep calm yourself.

If he getting any treatment for GAD? There are therapies and medication which may help him.