I know what it is like to envy people who die. Don't beat yourself up for your issues, it looks like both you and your guy understand where you are at and try to communicate better despite everything. I don't know what it is like to have bpd, but a lot of us suffer to a degree from bad childhood experiences. It is not the sufferer's fault.
the only reason i'm saying this is because i know i'm somewhat anonymous and also i won't be here much longer but this disorder has destroyed my life.
when i was in my early teens all i did was try to get into relationships, and in those relationships i would manipulate them so bad. blackmail them with suicide if they left, loving them hating them (it's called splitting), impulsive spending, drinking problems, sleeping with random men without protection, lying to get my way, and the list goes on. all this because my mental health team refused to acknowledge something was seriously wrong with me. i was diagnosed with psychotic depression up until i was 17, and then they told me the reason why they didn't diagnose me then was because it's impractical to diagnose someone before 18. but all that, to go untreated and given wrong treatments. a little too late. i did get better on my own over time but i still hold some of the shitty traits. i lied about being attacked when i was with another guy two years ago. because he wasn't giving me enough attention. and honestly i felt like utter scum after everytime i did it. being with my recent ex, he taught me how to not do those things. but often i would relapse into some traits and that's why he's worn out. that's why i don't blame him for him to need a breathing space, i want people to know really what bpd is because i'm sick and tired of people thinking it's just abandonment issues, when it comes with an array of nasty traits. and if left untreated, you'll basically just deteriorate overtime. i'm so sad. i got this because im forced to suffer the consequences of someone else's actions, that being my parents.
It's been 2 hours since you posted this but if it's any consolation I've been bawling my eyes out too trying to get myself together so I don't impulsively botch up a CTB... you did the right thing by reaching out here, its not the best time to CTB when we're feeling this way and everyone here is super nice and can chat with you while this passes. I'm in the same state of mind now so i can relate a bit.
yes i'm still crying as we speak, i'm here to chat for most of the night, i have nothing better to do. you aren't alone :)