Thank you everyone for your replies.

@ Bluebicycle, actually it concerns my partner. I talked to my therapist about his behaviours and how it affects the relationship, and also me and him. I feel he might be showing traits of borderline PD. But my therapist said that it might also be bipolar symptoms. but i am pretty sure my partner is not showing any of the symptoms i listed above. he is a rather stoic person, who never shows any signs of excitement or talkativeness or less-sleep. So 3 of 7 criteria is not fulfilled.

but my therapist said bipolar person might not show manic episode always. One who shows the manic episodes are easily diagnosed, but some others may not show.
That's where i got confused. If he is not showing 3 of 7 manic criteria, then how can he be bipolar??
that is why i asked out. Thank you for your opinions.