High Risk Bpd(dunno where to write really so i write here)

This is my first time on a forum and I have/am delt/dealing with a person I care deeply for that has BPD. I started a relationship with her almost 6 years ago and since then we have broken up 5 times. This time I left for the night with the kids because she was drunk again and I was sick in tired of not been able to talk to her without some drunken sarcastic remark.
I was always told that I do not show my emotions enough, so I saw a psych and started to learn to open up more (i actually did have a problem with this). We broke up because of a number of factors i.e. my having kids and she was not sure if i could commit fully to her and if we have children, she said she was not getting enough emotional support.
One day I was everything to her the next I was different and not really what she wanted.
She said she was very attracted to me even after 4-5 years together. The longest relationship she had was the previous one for 3 years and she left because she was no longer physically attracted to him. But she said she felt she was emotionally attracted and to this day still is.

We have seperated again about two weeks ago. Two weeks prior she sent me a msg saying how I was perfect in her eyes?

Her friend told me that she was having difficultly with my ex wife (the fact that the meeting/time i would drop the kids off would change at the last minute....causing my ex to become extremely angry and start drinking....which made things worse!)

I need to get consent orders signed by the court so there is no more last minute changes in relation to contact times/dates for the kids, i know this was an issue with her and caused her stress.

This is extremely confusing, I have been told by her mother and best friend she loves my deeply and the kids so why do we keep breaking up and getting back together???? This time I want to stay single and if she gets treatment and things are right for each other then I may consider starting again.....is this right????

Since we have seperated she has apparently stopped drinking every night and is exercising every day....which is great. But my friends say this may not last and when she is confronted with another problem she will turn back to alcohol and smoking...Is this true??

Really confused so I would like for other people who have BPD and Non BPD to please comment and give some honest advise. Thanks.

i'm really sorry im not sure what to say