LAK12345,
I'm so sorry that your mother chose to take her life in order to end her emotional pain. This is one of the tragedies of BPD, that suicides are over-represented by those who suffer from the disorder.
she decided to leave me behind because no one here, not even me and all my love, was enough to move on with her life.
BPD is a horrible illness and it's impossible to really understand the depth of pain those who have it may suffer from. Some are reached and helped, but the choice of self determination is out of our control, sadly.
You've been dealing with a professional and that's good, even though you still feel intense feelings, maybe guilt?
This might help give you more perspective to consider:
Recovering From Suicide LossThough the feelings of abandonment must feel brutal, we are here for you
Turkish