No, it can also happen if NOT abused. This is a common misconception. I know many who only took prescribed doses who ended up dependant! Tolerance to the drugs effects can build up even after years of use..nobody knows when it will happen, but when it does, it will be hell's turn.
Some who do manage the same small doses for years find they become depressed...it is a known fact that benzodiazepines cause depression and dependancy. But the extent of this is not well known in the medical community, because of varing doses and potencies of benzos; also, other meds given with benzos may cover symptoms. And of course, since usually people who are prescribed these meds have an "original" condition, that condition will be forever "the cause" of any symptoms or conditions(even brand new ones)that pop up in the future.... even if that original condition is no longer relevant (like sleep problems after a horrible divorce).
I know a man who was given benzos for a back injury(Valium is a muscle relaxant). He took the dose doc told him to, then when his back was better, he decided to get off....this unleashed terrible anxiety and insomnia problems he had never experienced in his life....he was otherwise a healthy body-builder, and these symptoms lasted about a year for him!!! Lucky for him, a "original" anxiety condition could not be blamed in his case, or it would have been back on the pills for him!
Now, he is perfectly fine, but it shows a definate withdrawal syndrome attached to these drugs, even at doctor prescribed doses....however, usually these symptoms will be attributed to "original conditions" by most medical doctors.
Don't underestimate these drugs. Last time you were lucky.....many people in the group had dependancy issues happen only after the second or perhaps third time in life going on these meds. The first time, nothing happened to them, just like you.
So, just be careful; maybe re-read some of the personal stories on the website....only a small percentage of the people who became dependant actually abused...the rest just followed doctor's orders.