Correction: You may *think* you're functional. In reality, your ability to tell good ideas from bad ones (like, you know, taking so much fucking Valium ) is already severely compromised.
Dude..fucking quit while you're ahead. God some people on here are dumb. 100mg Valium?!? That's a huge dose.
I'm not sure exactly how long it takes to build a benzo dependency, I would guess a few weeks maybe ? Just stop man.
Valium has its uses, it works wonders for anxiety. Less is more use it sparingly and always remember it's a short term fix. Address the root cause of your anxiety.