To miss my mum, and be a little sad about her family

[Alicewond]

My mum was amazing, and loved her siblings and vice versa. She died of a long illness. But after her death her sister turned away from me and my sister as it hurt her to see us. My older brother still has a close relationship. I called so many times to be told she was busy and would call back. Never happened. She was my mums sister and best friend, is it my fault I remind her of her?

She is being a total drama queen and its absolutely ridiculous her carrying on like this.
She's someone who lost her sister and best friend in one go and who has obviously struggled with the loss. It can't be easy for her when one niece sounds like her sister, and the other looks like her. I lost my sister a long time ago and it hurts when I get a glimpse of someone who reminds me of her, and we weren't that close.
It's crap for her and for OP and it's no-one's fault, it's just the way things go. Grief affects people in different ways. I'd write to her OP - fill her in on your news and ask her to keep in touch by letter if she can. She might, she might not, but you'll have tried.