I think it is her having hallucinations from being high. The "headlights" are just a bright light that she is hallucinating coming straight to her. "My friend weeping /
My friend singing over me" is her imagining her friend is in front of her when (s)he is not really there at all. "Get up around eight X4 / Let's make some coffee / And get real stoned / Hey let's play a record or two" is her referring to the only thing she wants to do when she is high. "It's cold as hell" is her becoming sober and having withdrawal.
I think it is her having hallucinations from being high. The "headlights" are just a bright light that she is hallucinating coming straight to her. "My friend weeping / My friend singing over me" is her imagining her friend is in front of her when (s)he is not really there at all. "Get up around eight X4 / Let's make some coffee / And get real stoned / Hey let's play a record or two" is her referring to the only thing she wants to do when she is high. "It's cold as hell" is her becoming sober and having withdrawal.