I gave up long ago hoping/expecting/wishing that people and/or family would understand my bipolar. No one can really "get it" unless they have it. My husband has a working knowledge but he admits he is not able to really "get it" he can see if I am having a rough time and he is there to offer support not a lecture or offer incorrect information.
I can be happy, sad, tired, mad and it have
nothing to do with my unique Bipolar.
Every person on the planet feels different emotions regardless of a "mental illness" or not...So yes its okay if your having emotions at least your not snowed under like a zombie.
You need to draw a firm line in the sand.. yes can be hard with family and friends , but hey just because they are family doesnt mean they are healthy people for you to open up to. Be calm and firm that "you do not need her input on your living with your Bipolar, you can and will take care of yourself ". You may have
wash rinse and repeat this until she finally gets bored and wanders off to bother someone else
PS. Don't be in any hurry when dating to disclose bipolar on any kinda of time line or date # whatever, hell you could be on date # 4 with a guy and think "oh wow ! Maybe I really don't like this guy for reason XYZ ?????.... So don't box yourself in thinking you
have to disclose a damn thing until you think there might just be a future with someone.
Just take care of you.

Welcome to PC , we all "get it " here !!!