I literally just posted this in another spot.
The fact that you have this diagnosis so early in the relationship gives me lots of hope for you. Many of us on these boards have been in long term (25 years for me) relationships and struggled to understand what is going on. I wish I knew earlier in my relationship what I know now...
This will be a great deal of work for you. You need to self-examine to determine if you are up for it
Look at
https://bpdfamily.com/content/what-does-it-take-be-relationshipTo help determine if you are up for this - you will want to do some reading to understand what you are in for.
To start with, I would read Stop Walking On Eggshells, Stop Walking On Eggshells Workbook, Loving Someone with Borderline Personality Disorder
Relationships with a BPD partner can be rewarding, particularly if you can grow together to address this issue.