1. Whenever that person does something wrong, they won't apologise by themselves, I have to remind them to apologise 90% of times (on the other hand, they expect me to apologise to them continuously for anything). Nowadays they do apologide but later make the impression they did it just to get me to stop mentioning the thing that hurt me

2. I can't seem to ever meet their expectations. I might put a lot of effort into the friendship and might do anything for that person's good, but they just end up expecting more and more and not being satisfied because of some different detail (like me responding to another person's message before the one they sent). It might even lead to them not wanting to talk to me for over a week

3. They basically went from being super nice to me and absolutely adoring me to being passive aggressive almost everyday. They might even go as far as laugh at my personal issues and fears or say hurtful things to me on purpose (not insults though, but things like "I wish we never met")

4. They won't appreciate any good things that life will give them, either. They might even lie about having the same issues as me and after it turns out not to be true, they expect me to be happy

5. They find a reason to want to leave me/block me basically every day. Some of them are reasonable, such as us not really getting along. But others can be really odd, even me feeling down about something or giving them advice might lead to them wanting to ghost me

6. At first they claim to feel inferiority complex because of me, and a while later they talk badly about people having my traits. They will say degoratory things about people who have the same lifestyle or life path as me and say things like "I would never want to live like that, it's so much worse"

7. I get the impression that I am the only person they know that they treat like this. Probably because all of the person's other friendships are surviving normally

Are these things signs of narcissistic abuse? Some people also suggested the person in question might be bipolar type 2, but I do not know how exactly it works