i think youre on the right track. but be kind to yourself and keep in mind as your head clears all of this will feel smaller, more graspable, and kind of hone its focus. as i think youve indicated, your mind is trying to clear. it will get there in time. i also think youre asking the right questions:
"The former relationship did not have any BPD component that I know of, so why was I attracted to a pwBPD?"
"I guess at the time I thought the BPD r/s was better."
^not technically a question but youre getting at the right answers to the right questions, and it shows insight on your part. ultimately youre the only one who can identify the "nasty truth about" yourself so you can address it but the good news is you are. do give yourself some credit
. thats not to say that members here cant help you identify your issues. i think you can gain some insight from just reading the experiences of others.
im not caught up on your backstory, are you seeing a therapist?