i know this is probably a stupid place to ask for advice... but has anyone ever had a serious relationship with somebody who had borderline personality disorder?

i've been seeing this girl for about 3 months. she's totally gorgeous, really cool to hang out with and into a lot of similar shit to me. we fight quite a bit though, and she's started treating me really weirdly. over the course of all this she mentioned things like she was in a psych ward when she was younger, she fuckes up all her relatioships with people and deals with it by running away, moving cities / countries etc.

the fucked thing is i was really really putting a lot of effort into this relationship and putting heaps of effort in to make her comfortable / loved. more effort than i'd put in for anyone in a really long time. yet she kept treating me weird and acting weird.

she once mentioned she had been diagnosed with borderline personality disorder but didn't really believe it (which probably stems from her parents who don't believe at all in psychotherapy). so i looked up some info about borderline. holy fuck! fit's her exactly. it's like i was reading exactly about her (extreme abandonment issues / treating her partner with intense adoration then intense disdain / intense feelings of lack of direction in life / suicidal threats / etc etc).

i do love this girl and want to help her.. and she seems open to help. she has mentioned she knows she probably needs to see a psych or go on meds.. but she seems overwhelmed by the complications involved in that and also knows that apparently her parents won't be supportive.

so what do i do? i mean, i've only been seeing her for 3 months... part of me thinks it's best to get out now and save myself the trouble. the other part of me thinks i don't just want to be another person that abandons her because they can't deal with her shit - so maybe i should actually stick around and help her through this.

opinions / experience would be great..