What do you call this..

[Cloudsix]

Will describe my friend. Someone who overestimates their place in other peoples lives - for example, sleeps with someone once, automatically assumes they're a huge figure in the man's life and is really confused if they ghost or aren't interested

If they reject someone and the person takes the rejection well, they worry that they mean too much to that person and the person will set out to do harm to them and become resentful

Meets someone once and assumes they know them really well, and maybe they have a special bond when the other people probably just thinks "oh I met them once and they were nice"

Essentially feel like everyone is out to get them, or maybe will dislike them for no reason, but not exactly "paranoid" as they continue life normally.

Other than nuts sometimes - is there a psychological term for this? That maybe I could research? I've googled this to no end and really not gaining any explanations.

I hope you don't call this person a friend... and if you do, I hope you keep this friend at arms length.

They sound narcissist.

Abandonment issues and naïve. Friend is better off without you.

Deluded?

Confused where you've gotten that they're better off without me, purely from me describing examples of their behaviour? But said abandonment issues and naive in the same comment?

A bit contradictory if they think everyone is out to get them but also feel on meeting someone once they are great friends

See I thought this too.. but when I've read up on the term, usually narcissists don't even think they're narcissistic in the slightest, and are completely unaware.

Whereas, my friend will tell me she feels like she's maybe being OTT in her behaviour and assumptions or apologise profusely.

Borderline personality disorder?

This

You calling your friend nuts isn't ok. Look at your own behaviour before you judge others.

Classic BPD

Sounds like you are all about 13

I'll do some research on this - was there a specific example I mentioned in my post that makes you think this?

I've heard of it before but never really dived deep

Probably a slightly immature person trying to grow out of a shitty, detached upbringing. Maybe there’s a golden child ahead in the pecking order. Somewhat emotionally cold mother, a distant father.

Am I winning?

And something to do with laundry.