why does he not want to be my friend

We were in so much in love but couldnt be together ... we went seperate ways it hurt like hell .. 
never show me your kids he said 
I said we can still be friends .. but he said no .. 
why does he not want to talk ??   
Never seen him for a long time
I just wonder if hes ok 
Part of me feels like its dead
Iv moved on but not the same
It really hurts !!!! 
Ive asked people but say theyve not seen him and some others say hes not the same !!  But hes moved on with kids and wife !!!