I'm really fed up. 

My mum was given 3 to 6 months to live in April and she has gone downhill a bit . Lost loads of weight and literally hasn't got the strength to even cook herself something or feed the cat. I do everything for her more or less. 

Thing is I have an older sister who is no help whatsoever. Her life hasn't changed a bit . She is a nurse aswell believe it or not and I just feel alone in this. It was the same when mum was drinking too much. She washed her hands with her because she thought mum was selfish so she had nothing to do with mum during that time. I was left at 13 caring for my drunk mother. Dad left and went to his own flat and actually told me to get my own place. He is no support either. 

I'm angry about this and I have no-one to talk to. I feel like I'm the only one that's ever been there for mum. Don't get me wrong I love my mum and would do anything for her no matter what was wrong with her even if she was drinking heavily again I would be there for her because she has always been there for me no matter what. 

My sister goes out every weekend and she pops by with pointless things for mum like chocolate and beauty treatments. Mum hasn't got the strength to do anything let alone go for treatments  and eating is a no no especially chocolate.  I'm annoyed. I'm angry and alone. 

I really don't know how go process this anger.  I can't speak to my sister she isn't the type and it would only cause more problems if I did and mum don't need to see us arguing. 

I don't know what to do with these feelings. I have nowhere else to turn.