Relationships with people with BPD (pwBPD) seem to range from immensely gratifying and intimate to intensely cold and instant. Sometimes they flash through that range in an instant. I know that mine did. The bpdfamily helped me learn to deal with it much better. I hope that we can help you as well.
From what you have written, it seems clear you will get good ideas and support here if you continue to read and post.
What do you think is the right direction for you, and the best kind of help you hope to get here? There is a lot of information here - articles, workshops, etc. - and we'll help you find what you need.
Keep posting - it is very therapeutic, and you will be greeted by so many people with circumstanced similar to your own. You will be amazed. Take care of yourself.