I don't believe there is a cure. A disorder this deeply rooted in childhood is not something you can just shed... As the psychologists like to mewl on about... Our childhood is where we're built from the ground up. You can't go back and fill in the cracks in the foundations.
Intense treatment can alleviate symptoms and teach you to cope with ongoing symptoms so you can lead as normal a life as possible. But as hopeful as I get that 'everything will be okay' It always comes back.
I didn't get an official diagnosis until I was over 18, but between doctors throughout my life, my confused mother and messed up me heard the label many times, no one able to put a big read BPD stamp on me until I was a legal adult. So I'll say with a good degree of certainty I've been living with it for more than ten years... and it's quite episodic actually. Mine comes, messes everything up, and fades away a bit, to live in the background as a steady hum. But it always comes back.
We'll see in the next decade?

You CAN manage this. It can be done. You need to know it, know what it does to you and what's going to trigger it.