What happens when you leave you pw/BPD

My wife who has BPD has disrespected me, hit me, etc. I am sure alot of you know how they work and what they do, which makes you feel very low.

Usually o become the bigger person and try to console them and forgive them and it's a cycle on repeat.

I left this time been about 2 weeks ignoring multiple calls and texts, might go as far as splitting up at this point.

Anyone been at this stage what advice do you give? They have promised on text never to do it again that they are very sorry.

Anyone been here before do they actually ever change or not really? They've been seeing a therapist past 3 month but don't even do the worksheets they are given.

Any advice would be appreciated thanks!