People are more than a diagnosis and I think it’s important to keep that in mind first.

Having said that, if she has a repetitive history of doing stuff like trying to kill herself, avoiding therapy, or engaging in untrustworthy behavior (cheating, stealing, whatever) then I would view those as red flags that would warrant apprehension in any possible partner, BPD or not. I don’t say any of this to discourage you, because for all I know she could be your match and you could be the person that saves her life. But you should understand what you are getting into and asking yourself if you have the ability and motivation to make it work.