Hello Butterflychick
Welcome ! Here you will find people who understand because they are in the same or in similar situations.
Having a BPD mum is hard work, I can testify.
You are talking about wanting to help your mum. What do you do for self care ?
I have thought many times about ending our relationship but I could never leave her to my sisters to deal with. That would be just plain cruel.
In my opinion everyone is free to make choices. If you decided to have LC or NC (low contact or no contact) with your mum, that would be completely justified. The only thing you should make sure of is, that *you* are happy. If for you being happy means still having some form of contact with your mum, that's perfect. Then you can decide to learn more about communication skills and so on.
If you feel that you are not happy having your mother in your life, than it's completely justified to see her less/to not see her. Also, NC does not have to be forever. You can resume some form of contact any time you want, f.e. when you feel stronger.
Also your sisters are adults able to make choices. They are also under no obligation to see your mum. You should make the choices healthy for *you*, they will make the choices healthy for them.
What do you think ?