Who am i

So let me introduce myself to you

I dont have one name I have quite a few 
The first time you meet me you'll call me you're friend 
Through thick and thin with you from beginning to end
Soon all you're attention will be devoted to me
It wong be long till I'm all you'll see
You won't bare the thought of me not being around
Even if i cost you every penny every pound
For me you'll do anything like beg, lie and steal
You would rather have me then eat a single meal 
When it comes to you're priorities ill always take first place
And that first rush I gave you you'll forever try to chase
Soon I'll be in complete control
Cuz I'll be the one whom you sold you're soul
Get to this point there's no turning back
Because you chose to smoke the crack!