You messaged me again

You messaged me again,
 You say you still want to be friends, 
That the 'other' girl doesn't matter anymore, 
That you still love me,
Even though you had sex with her.
I agree, only because I'm to heart broken,
To sad, 
To comprehend the damage this could cause,
So I once again reply with a,
'hi'
To your hey.
I try not to answer your 'what are you up to''s  
But always fail,
Next time I'll answer with silence, 
Next time with a glare, 
But, which 'next time'
Am I going to listen?