Hey Clock, welcome

You'll definitely find advice here, in the form of learning some new tools and skills that can potentially change the dynamic you're in.
How have you typically dealt with the mood swings? How has that gone?
While I don't have a significant other with BPD, my husband's kids' mom has many traits. So, I know that others in this group who DO have SO's with BPD will be along to share with you and support you.
Glad you're here;
kells76