Hi Sadsister16 Welcome to our online family.
I am so very sorry for the loss of your mom and now your grandpa too. This must be a very hard time for you and your dad. What kinds of feelings are you experiencing right now? You mention that you are afraid. Being around someone with BPD often leads to fear. They can be difficult at best and next to impossible at worst to deal with. My uBPDm was so often that way, and they leave a trail of hurt to those of us around them.
Have you been able to encourage your dad through this time or does he seem overwhelmed too? There are many members online who have situations similar to yours. I'm sure you will receive kindness and support from them too. How did you learn about BPD?
Keep in touch with us! We are here for you!

Wools