If it is a sin, where's my existance?

Doko ni mo nai no yo atashi no tomoshibi
Zurui wakono mama anata wa shira nai

I'm falling down and down

Tomadoi setsuna sa
Kurushi sa samishi sa mo
Subete motsurete omowazu
“Aishite iru” nante tsubuyaketara

If it is a sin, where's my existance?

Anata no tabako no kemuri ga chikaduku
Atashi wo hidoki kyozetsu shite yurusa nai

I'm falling down and down

Kuchi hatete kiete shimau
Kajitsu no you ni ima mo
Munashiku anata wo omoeba
Omou hodo toke ochite

Somebody tell me
Is this a sin by loving him?
I want you I need you
I can't stand it
Don't know what to do

Memai warui yume
Mune zawagi obiete iru no
Atashi no kuchibiru ga
Omowazu morashita tsumi wo
Onegai
Anata no ude no naka ni wa mada ima mo
Atashi no ibasho ga
Kakusarete iru kara
Nee
Yurushite

If it is a sin, where's my existance?