Hi baboo5. Welcome to Psych Central. I am sorry you are struggling to cope with a relationship that sounds emotionally unstable. If your partner would go to a psychiatrist they could get a diagnosis. But that may not be possible.

If you want to read more about this on your own the following articles may be of interest.

https://psychcentral.com/lib/loving-...lity-disorder/

https://psychcentral.com/disorders/b...rder-symptoms/

https://psychcentral.com/blog/archiv...lity-disorder/

https://psychcentral.com/ask-the-the...oping-methods/

Feel free to PM me and or reply to this post.