I am not guilty.
I am innocent.
I don't go out or meet people at all.
I am a shut-in.
The responsibility is mine [lies with me].
The responsibility is mine.
Responsibility lies with me.
That's my fault.
The responsibility for it was fathered on me.
I am pathetic.
I am responsible for the mistake.
I am easygoing.
I'm easygoing.