These are just a few indicators. Never fight with or agitate someone who is going through withdrawal, because they can be violent. No matter what stage the addicted person is in, you need to seek help for yourself. Whether or not they are ready to change, you must take care of yourself. You must do everything to stay sane and not be destroyed with the addicted person.
Addiction is like a cancer that begins to subtly replace healthy cells with malignant growth.
Only when the person is ready to change, can you be of any help. Anything that is done before that time will only be misunderstood, and will bring much pain onto oneself. However, when the addict is ready to change, there is much hope for recovery. You can serve as a guiding light that shines towards the path of recovery, but the person must willingly walk towards that light. Once there is a desire for change, guidance and encouragement by someone close to the addict may be good.