Hello! I would like to join
bluek9 in saying welcome to the board. I am glad you found us as many here can relate, not just to having a mother with BPD but also with not knowing what to believe or feel and having a hard time speaking up. Unfortunately it seems to go hand in hand with having a mother who exhibits a lot of the same behaviors you mother shows.
I learnt to keep my opinions to myself so much that now I don't know what I think or feel or believe. My husband gets so frustrated at me because I can't express myself, I simply look at him like a deer in headlights when he asks me what I want or how I feel. I don't know. I wasn't allowed to think or feel for myself.
It is difficult when the behaviors we used to survive in childhood and adolescence follow us into adulthood and affect our relationships now. The good news is that now you know about BPD and how your mother's behaviors adversely affected you, you can, learn different ways of communicating and you can conquer these old, no longer useful behaviors and demonstrate better ways to cope and interact with people to your daughter.
First though it is good to get a handle on where you think you are in the healing process, though healing is by no means linear. If you look over the the right side of the page you will see a Survivors Guide. Each item in the list expands to give more information. Where would you say you are right now? Again, you may find you skip certain steps or are even between 2 or more at the same time.
We also have a Lessons section right above the Survivors Guide and also pinned at the top of this board. There is a lot of stuff to read, but take it slow as you can burn out.
I am glad you posted as you can get a lot out of relating to other people and getting the support and understanding you need. This is a great place for that. I can't really describe how much help and how much I have grown over the years as I have posted here, but I would be much father back than I am now.
Hope to see more of you on the boards.