Hi iamnotcrazy,
I am very sorry to hear that things are so difficult for you right now. It sounds like you really love this girl, and I can understand how hard it is when things don't seem to be working no matter how much you want them to. It is great to see you reaching out for help and support - a very brave and scary thing to do.
This site is a support group for those who are or were in a relationship with a person with BPD, so many of the posts can be triggering to a BPD sufferer.
Thankfully, there are resources of the type you're seeking. Please check out
Resources for BPD Sufferers.
I wish you all the best on your journey.
heartandwhole