I'm Walking Alone lyrics

Grey is the day Big is the sky It's cold outside But i don't mind Have to leave behind My cosy cage Have to step outside My cosy cage My cosy cage Step by step by step I make myself happy I'm walking alone In a world of my own Step by step by step My heart's getting lighter My day is getting brighter I'm walking alone Step by step i forget I leave behind ...... 'Cause i'm longing inside (???) The warmth of my room (???) I make myself happy As i'm walking alone I make myself happy I'm walking alone I make myself happy As i'm walking alone I make myself happy I'm walking alone I make myself happy As i'm walking alone I make myself happy I'm walking alone I make myself happy As i'm walking alone I make myself happy I'm walking alone