Hi Kipper,
Yes, Andy's reply is spot on. It's how you handle anxiety which matters. I am pretty chilled out, most people are more anxious for me than I am for myself. I do occasionally think "oh this is quite serious", but it soon passes.
If you can take the relaxed attitude you will find life much more pleasant. It'll be hard to change your friends attitude and you probably shouldn't try, it's just the way he is. If he manages to move himself from the dark side to the light, welcome him in, but don't try and push him, no amount of logical argument seems to be able to change the underlying anxiety level.
Barry makes an excellent point about this group having a disproportionate number of problem cases. When I started reading posts on here about people going from T2 to advanced mets in the blink of an eye, I started to get a bit more anxious about my own condition. The reality is 47,000 men in the UK get diagnosed each year and only about 100 actively post here. Naturally a lot of posts start with "I've got problem x, has anyone else got it", though to be fair quite a lot of posts start "Hi, I'm doing fine" which is really nice to read.
I assume the other 46,900 men are just doing fine. The other possibility is they all die before they get time to sign on a computer (dark humour helps me).
So just keep getting on with your life. Keep posting here, good news or bad, the more posts we get the better this forum can represent the reality of the disease.