Knock! Knock! Anyone In..?? Its me who makes you sin..!!

'Knock! Knock!'
'Who's there??'
'Its me'
'Who me??'
'I am you'
'Didn't get you!'
'Trust, doubt why?'
'Then, who am I?'
'You are real me;
One others can see'
'I have no twin'
'I am your kin'
'Where have you been?'
'First Lemme in'
'Aren't you the one?
Who had much fun
Cursing people good
Acting very rude'