Hi Serge, thanks for contributing to the forum. The line - "You're like an addiction for my soul" is saying that without you my soul suffers or feels empty, like one might with any type of addiction. This is expanded in the next line - " I am hooked I cannot do without you". Being hooked on something is like being addicted to it. Put simply I am saying that I need you, to feel normal, like an addict needs to for fill their addiction.
Hope this helps
Cheers
Grainger