None of us here can tell you if you are BPD, NPD, or any other mental illness. Most of the recommendations when partners come here looking for an armchair diagnosis is we tell them to look at behavior and longstanding patterns.
It may be you are lonely, have some abandonment issues, depression, codependent or the things you listed. Read enough threads around here and you will notice you aren't the first person to cope with their loss using sex. Some drink, some work, etc. Was it a healthy coping strategy ... . only you can tell us.
Here's the thing we all have our baggage. It could be traits of BPD or something else.
Knowing that something is off or wrong is a good thing. Its the yellow at the stop light... . the caution. It's the opportunity to address the problem.
It won't help you labeling yourself with our armchair diagnoses, but seeing a therapist will and asking them about your traits can help. Also working through the problems and feelings as they arise. Looking for proper support.
This might help a bit explain the disorder, the differences between traits and clinical BPD, and some of the nuances
https://bpdfamily.com/message_board/index.php?topic=63511.0Sorry I was being factitious Ive been through this before and went back in to the relationship a few times. I was joking about having BPD... . I have been through regular breakups. I dont question my own sanity during those breakups. I can assure you that I have no PD>
I have some codependent and possibly narcissistic tendencies. Ive never looked at sex as a healthy coping mechanism for anything... . my BPDex uses it as a coping mechanism. I dont enjoy being intimate with strangers... . (im very sensitive). I just felt like i had to sleep with somebody else because when she comes back around thats one less thing she has power over.
Yes I am lonely... . but also suffering from depression and nightmares ruminations etc... . projecting and splitting a little... . basically acting extremely out of character. However, once you've been through this several times... . you start to get used to it and more self-aware which i guess will eliminate the unwanted behaviors much sooner this time.\
I was just fascinated at the levels that i have sunk to as a result of this relationship. During her idealization phases I would just start knocking myself off the pedestal immediately... . I was very conscious of her behaviors and my reactions for a long while... . but I just snapped Feeling defeated... .
However, relationships (esp w/ nBPD women) are not like work where the harder you work the more you are rewarded.
They beat you with the carrot and feed you the stick.