The Weakness Returns

Well, well, well,
You have returned again,
Both a friend and an enemy,
In equal measure,
You make me feel happy,
But also sad,
You make me feel wonderful,
But also disgusting,
I tried to do ignore you,
But to no avail,
Clearly, we are meant to be side by side,
One associated with the other,
I have come to loathe you,
But I can't go without you,
We may as well enjoy each other's company again,
As I am too weak to ignore you any longer,
You filthy piece of vermin.