I cry out, try to tell them, but no one listens, they all believe

I cry out,
try to tell them,
but no one listens,
they all believe her when she says,
"yes, i love him!".
They are all planning
planning for that special day
the day they commit their life,
the first time to say those 2 special words,
"I DO".
No matter what i try,
to tell them its all a lie
no one listens.
they dont hear my cry,
the cry for attention this ONE time.
All i want to do,
is make it so i dont have to see my sister ruin her life,
by comitting to being his wife.
To this couple,
i am a ghost,
I live but no one really knows.