i’m sacred i screwed up this friendship with this girl

i’ve been diagnosed with BPD now with 4.5 months i was talking with this new girl and she’s shown me sm affection and love and caring and i fell hard for her and last night we were talking and she was with friends and out of no where she said she doesn’t want a relationship with me and i gave it a few minutes than i just opened up to her abt everything and how i felt like she played me bc she knew i had BPD but she still treated me like i was her boyfriend and i don’t know what to do bc i still don’t know how to deal with BPD