I'm not sure.
I did it with the help of SR. But I also changed almost everything about my life...my friends, what I did for fun...
I also changed what I turned to in crisis fear or pain. I found better healthier ways to solve my problems.
None of that worked immediately so I had to have a good deal of faith I was heading in the right direction.
I also needed great reserves of patience waiting, sometimes with my insides screaming, til I got to a better place.
If that's 'alone' to you then yeah it's possible
It's a big ask tho - are you up for it?
D