Got officially diagnosed and I feel so alone

Last week, I (20F) met with my college free psychiatrist services and the session ended with him saying he thinks I have BPD and that he recommended further psychological testing to get an official diagnosis.

Welp today I spent $200 on a zoom call with a mental health practitioner specialized in BPD, and to nobody's surprise she also thinks I have it. She's sending me documentation of the diagnosis as you speak.

I've suspected it for a while, although I often chalked my symptoms to ADHD and depression which I also have diagnoses for. At some point I realized the immediately jumping to self harm, substance abuse, and suicidal thoughts was way too extreme of an emotional reaction for either of those conditions. Not to mention that the person I consider my best friend fits basically all the criteria for a FP, from the excessive clinginess, to the relying on them for emotional support, to lashing out when I don't get my way (and then feeling horrible after), and to wanting to die or hurt myself if we're not on good terms.

But now I have the diagnosis I feel kinda....empty. Because unlike with ADHD, BPD is hella stigmatized and I'm scared of people seeing me differently. I want to tell my closest friends, especially those I've already opened up to about self harm and unhealthy habits and the like, but the thought of losing even MORE people or being seen as some monster nut case just scares me so much and I can't deal with it. I already have issues with being clingy and asking my friends to tell me they don't hate me so I don't know if telling them I have BPD will make it worse. Oh, and my parents don't think it's a real thing. And my rocky relationship with them is probably why I have it in the first place so I sure as hell ain't opening up to them.

I'm legit spiralling over what to do and that sucks, so I guess posting on here was my attempt to mitigate that. How did your loved ones react if you told them? How did YOU feel when you got diagnosed? How old were you? Distract my suispiral with your life details por favor