Absolutely you can be a good mother!!
I think Dr Grossbart has given you some excellent advice.
I think you should get yourself into good therapy.
Don't let your fears control you and you'll be a great parent.
Good luck.
J
Absolutely spend as much time with her as you can. Have some back-up caretakers so you can get a break when you need it. Know when you are having a bad time and let them take her for a while. Get some good experienced parents (quite possibly not your own) to be an informal advisory board on how to handle tough situations.
Borderline is a very tricky diagnosis, don't assume it is correct or that even if parts fit that that means it all fits. Google around and form your own opinion.
Get the best treatment you can, your problems are very treatable if you stick with it.
tg