While I'm all in favour of joining the army (no, no real interest myself - my father was a soldier for almost 30 years though), I don't know/think it'll be the solution for you.
Yes, being forced into a regimen is good, and order and structure will probably do you good. But there are really only three things that can happen in the army for you, as I see it.
A) You end up deployed, which is a HIGHLY stressful situation, also as a comm officer. It's not because you're in, say, a base in Germany or Turkey (or Afghanistan or whatever, of course) that there's no danger. Direct "being shot" danger isn't all that big, but being away from all friends and family for months on end - we've got a few army wives/husbands/etc here, ask how they like it - and consider it's just as bad in different ways for the ones gones.
B) After a few months of rigourous training, you end up in a mostly-dead-end, mostly-uninteresting desk job - which will be no better than any desk job you might go and do outside of the army, and probably with worse prospects for growth.
C) You break during training/boot camp/etc. Some people need "tough love" and being told they just need to get it together. Some people need counseling. Some people need to have a path pointed out for them so they can just follow it. Some people want to find their own path. This is not, in any way, meant as a slight towards the army or non-soldiers, and the army
does have good counseling and support - but you can imagine that's aimed more at those returning than on those who're only just starting out. I think you'd be "happy" for a while, as the sense of purposelessness is gone - but that you'll fall into an even bigger pit when you realize
you're not the one deciding your fate and making your life anymore. You seem (but I may be projecting) to live too much in your head to let others make the big decisions for you - and you
will have to accept others deciding for you in some cases in the army.
I certainly understand toying with the idea - I've considered regular armed forces, Foreign Legion (at least you're sure that no matter where you start, they
will fix you up physically and you
will do something worthwhile - if dangerous) and civil defense myself at one point or another in my ups and downs - but I doubt it's a decision that'll make you happier or more accepting/content in life in the long run; quite the opposite.
I know I'm struggling with depression myself and still haven't visited a ppsychologist or psychiatrist after, what, 5 years now? So hey, I'm not doing great in the "cleaning self up and getting help" department and I may come off hypocritical, but...Well, I do think you
should find some help elsewhere first. At least to me, making life long, drastic decisions (such as joining up, or moving to another country, or switching careers to a completely unrelated field) in a position where you've got trouble figuring out who you are and what you want to do is dangerous. you may think that deciding will force you to like it - deal with what you've got - but that's not the way it works. Figuring out what you want is tough (I still have no clue), buit it has to come
before this sort of decisions. Once/if you feel better about yourself and feel more balanced, and you still think the army would be a good idea because you want to give back to your country or protect American Oil or want to be Rambo (I'm kidding, I'm sorry - there really are plenty of very good and honourable reasons to join) - go for it!
Lastly, I'm going to try and lure @
Docseverin in here. Amongst all of the forum, he's probably best placed as an authority in a conversation about the armed forces and self image issues and so forth.