Hi Mickyt84,
I am very sorry you are in such a difficult situation with your girlfriend. You mention her being diagnosed with BPD, bi polar and depression. When did she get these diagnoses? Is she currently being treated for any of these disorders?
Her abusive behavior is quite disturbing and concerning. Do you feel safe around her?
You also mention her slapping both kids in the face recently, was this the first time she did that?
We have some material here about safety first and domestic violence that I encourage you to take a look at. These resources can help you assess your and your children's safety situation and aide you in your further safety planning:
Safety FirstBorderline Personality Disorder and Physical AbuseWelcome to bpdfamily