I take Diazepam regularly for muscle spasm from prolapsed discs in my back. I take a high dose and the problem is, the longer, and the more you take, the more tolerance you build to it, herein lies the addiction... its physical in majority of cases dependant on reason for being on it.
It is HORRIBLE to stop taking, having done so, in the past. It was probably the worst withdrawal I've ever experienced and due to the nature of the drug, you don't actually get a proper withdrawal for almost 3 weeks post cessation. Nasty, nasty nasty.
THat said, if you need it, then you need it. I need it, along with many other different meds and am monitored by my GP, I've had it prescribed now for almost 18months along with high doses of morphine whichi've had to take for longer than that. Luckily,i'm not a zombie! I manage ok day to day, pain almost controlled. I'm not a zomie due to taking it all long term. HOwever, it really does only have any decent active properties for about 3-5 if used for spasm relief. Which is why i dont take it every day, 3 times a day etc... I would imagine, it must have a better length of time if used for anxiety, as it is prescribed for longer periods of time.
I have been known to take it, in times of great stress and it has been fabulous. I did eventually have to admit I needed slightly longer term help for those issues and take Sertraline which is a good antidepressant. For me, it has been much better than citalopram. I started this due to my inability to cope with the fact my career was pretty much taken away from going to work one day, have a patient fall on me and cause me huge back injuries.
I did just want to add, I'm a staff nurse, so do 'know my drugs' ! So i'm not talking completely out of my bottom...
THough, have just taken my night time dose of various meds, so have waffled faaaar toooo long, said faaar tooo much about me, and I'm very sorry
I really hope you get your issues sorted out, please contemplate the longer term solutions too. There is no reason why you cant have and anti depressant and some diazepam as a back up should you need it.