When I read online it has vague explanations as to what bpd is. I’d like to hear personal stories or feelings so I can understand. It’s weird to think that the woman I’ve known, could have just been the way she has because of a mental illness. I want to understand what is my mum and was part of her is her illness. 
Growing up my mum would have 2 sides to her, day time mum and night time mum. In the day she’d be funny, social, bubbly and that was my Favourite time. Then at night she’d become depressed, cut herself, get drunk alone, cry and be mean to me. 
Is that because of bpd?

She struggled to keep relationships and friendships, growing up I didn’t understand why but now I have an idea. She tells me her friends copy her and want to be like her, or they’re jealous and it annoys her. She will be friends with someone for around 6 months and ill hear reasons of the friendship ending by: jealous, manipulative, crazy, narcissist people.
Is that because of bpd?

Thank you for your help. 
Ps my mum is lovely and I have a great relationship with her so please try to keep your words as sweet as they can be 🌸