McRainy

Nobody follows darts mate on here.

Second rule...

The first rule of knee club is that you don't talk about knee club. 

The first rule of knee club is that you don't talk about knee club. 

The first rule of knee club is that you don't talk about knee club. 

What, again?

What, again?

Wtf is that,I don’t understand it?

I think it probably does have a reason to be there, but not, as you say, necessarily related to the immediate circumstances.
The understanding which makes most sense to me is the overstimulation of the fight/ flight response, which creates neural pathways which remain overactive at inappropriate times. This can be caused by a number of things, from early trauma to a gradual build up of stress over time. 

Last night. Poxy hill was steep  
 

Spam emails about tax refunds. How stupid do you think I am?

I love that theres 3 people all taking a photo at the same time of a plate of rice, what has this world come to ?

Christchurch earlier this evening.

Cold pressed coffee milk stout 5.5% Drop the Anchor micro brewery, Christchurch. Stunning.

Anxiety is not 'nerves' and depression is not sadness. Unfortunately, it is this misunderstanding which can lead to the pressure to 'pull yourself together'.
Life is not about 'being happy' either, imo. Many people are either born into circumstances, or with conditions, which make this rather glib expectation impossible. I suspect that many, particularly in our consumerist culture, feel that they are failing if they don't achieve the 'happiness' that modern life is supposed to provide.
I think Moist One nailed it when he said that the key is awareness. The delphic injunction is to 'know thyself', and in psychological or existential terms, this is the journey we are on. From this viewpoint it doesn't matter so much what our outer circumstances or our inner traits are, we can find meaning and purpose in our lives through understanding ourselves. This is how it works for me, anyway. 
https://www.psychologytoday.com/us/blog/the-consciousness-question/201409/the-delphic-oracle-and-individuation

Certainly, people talking openly and honestly about their feelings and experiences, in an environment which listens, accepts and tries to understand, is one of the most powerful and helpful things you can do. Peer support is often the best therapy. 

No, surprisingly he has a fairly pleasant Girlfriend.  
She seems to be one of those goo'ey sweet kind of girls who describe him as "a big kid", where as other girls may just think he's an immature idiot and needs to grow up.
Saying that though, it's good he does what he enjoys - can't really argue with that!

I agree with this.  I've read @David's view and I think it's overly simplistic as it's not quite as straight forward as you make it seem.  
I've been a Police Officer for 12 years and throughout my adult life I've always been a more anxious person.  I've struggled to sleep at times.  
People think anxiety = nerves and worry.  It doesn't just mean that.  It also means being unable to relax, having a brain that won't shut off, over thinking things and of course it does include nerves and worry that you mention.  Particularly with things like social situations, family events, meetings, big occasions, etc...
The best way I can put it is, Anxiety doesn't have a reason to be there.  E.g. you may be chilled out, you may be off work, no issues, but you're still tightly wound, you still can't quite relax.  
I'm not always anxious, but there is a reason that Depression and Anxiety goes together.  They feed off one another really well (unfortunately).
...
In regards to Depression, it's a really weird beast.  For me it is a feeling of low energy, a zombie state, like I'm floating along without experiencing anything.  It feels like I have a massive weight on my shoulders.  I get more paranoid too about things that happen, like a comment a colleague makes, and I also want to just be alone.  
I'm not even sad, really.  I'm just nothing really... just in an emotionless state.
Depression is a massive spectrum.  It's not just someone being really sad, crying and all that.  I'm not like that at all.  
 

Certainly, people talking openly and honestly about their feelings and experiences, in an environment which listens, accepts and tries to understand, is one of the most powerful and helpful things you can do. Peer support is often the best therapy.