It appears you're not willing to end the relationship? I'll give an advisory and then a description of what often becomes the practical solution.
The person with BPD (often never officially diagnosed) typically has an
all or nothing perception... love or hate... love bomb or total rejection... abuser vs victim. Alternating extremes are common. PwBPD react and overreact to subjective feelings and perceptions, whereas the facts and reality are generally your hopes and dreams getting dashed. What that means is you're very unlikely to get a good outcome. Not impossible, but probably unlikely.
About that "unresolved conflict"... A lot depends on whether you've been permanently negatively "painted black". If that is the case then you will have to grant yourself
Closure and then
Move On with your life... elsewhere.
Maybe your attempt at mediation could work — for example, try to avoid triggering her, definitely a huge task — but be prepared in case it backfires. If you try to get her to admit to an assault and without any independent corroboration such as a witness or a recording of the incident or an admission, she could do the opposite and accuse you of assaulting her. (Remember the BPD perspective...
"It's All Your Fault!") Want to guess who — the man or the woman — would be more likely to get default preference in court?