Hi Happy Face,
Welcome to the BPD Family
I'm sorry you find yourself in the middle of 3 people with BPD/BPD Traits, you're out numbered! Such a tough place to be. I think moving and creating a physical boundary was definitely a good idea and you are not being a "bad person" for living your own life. You are making some healthy choices for yourself. (And I can hear you now thinking but that is so selfish of me... .I'm here to tell you it is not selfish it is self care ).
I feel stuck and like I am being blamed for being the 'bad person' and that I am 'leaving them behind'... .
This kind of stuff is what we call FOG (Fear, Obligation, Guilt) or emotional blackmail. We see this behavior often and it does take time to get out of the FOG, but I think it is really helpful to understand what is going on. It makes it easier to take things less personally when you see this stuff for what it really is.
Here is a link to more on FOG... .
https://bpdfamily.com/message_board/index.php?topic=82926.0What kind of contact do you have with your mom and your sisters currently? Do you see them often? Phone calls/texts? Email? We can certainly help you problem solve your interactions with them.
There are a lot of tools and strategies that we can try that are in between the way things are now and going full "no contact" with everyone if you are interested in giving them a try. We can also have a conversation about no contact (NC) what that might look like if that is the route you choose to go.
Are you seeing a Therapist at all? If not it might be something to consider, it can be really helpful to have that support in the real world to complement the support you get here.
I'm glad you've found us and decided to jump in and post.
Take Care
Panda39