Hello jeremiahgirl: Well... the Skeezyks has never received a formal diagnosis.

I suppose there must be something written down somewhere for insurance purposes, if nothing else. So I guess I can't really resent something I don't actually have.

I do frequently resent all of the terrible things I've done over the years,

which I presume (hope?) were the result of having been struggling with mental health issues.

How I manage those feelings is to simply strive to accept them... with compassion.
I once read the book
Lost in the Mirror which, of course, is about BPD. In reading that book, I thought that there was a distinct possibility I could have been diagnosed with it when I was young. This would, however, no longer be the case.

I was told, by my last therapist, that BPD tends to burn itself out as one ages. So I speculate that perhaps this may have been what happened with me.
In my case, I think what replaced my BPD (if in fact I ever had it) was depression & anxiety. So, if you take my case as instructive... no you won't struggle with BPD symptoms all of your life. But they may simply be replaced by symptoms related to depression & anxiety. Of course, I don't know... I'm just speculating.

But I think the important thing is to do whatever you can to heal from your BPD so that you don't continue to struggle as you get older.