@ToniS,
She says "It's best that we don't talk."
Your answer ought to be, "Whenever you are ready to begin again, I'll be here."
You are not abandoned, you have your family and friends (and, godhelpyou, us)
One hint: Stop making laundry lists of what you did for her. It's a useless occupation of your mind and time.
Let me tell, so far, no one is dead. Let things be as they are.
You may never hear from your sister again, but your life and loves are not diminished by that, they can only be diminished if you spend time not loving those who do love you.
Always be the first one to be kind, never be the one who lets anyone guilt them into being untrue to themselves.
She'll call.
Ask "How are you?"
Joe(listen)Nation