A Good Thief Steals Clean

It's my mistake
Nothing left to take
I used to wonder if it showed
You left a lot behind
And everybody knows
A good thief steals clean

You used to spend those nights
Passing time
On whatever you could find
Even without [?]
I couldn't see you [?]
You were such a waste of time

The details slipped my mind

You know why
Or at least you should
It wouldn't make sense to hold on
But a person can know someone
Without knowing all the words
Some people will even think

Words don't matter much at all