I think I kinda get why previous BF dump her, or the fact that she has no friends to begin with, she's too clingy and changes mood borderline extreme, almost menhera, but can be pretty sweet for some, I guess previous bf just after her body and then after getting what he wanted he basically just dumped her
Noa is an extrovert with ADD & anxiety disorder
One of the symptoms of ADD is hyper focus. In relationships, some people with ADD do that to their partner. It comes across as clingy, but it's just that he has 100% of her attention. There is literally nothing else going on in her brain at the moment when she is interacting with him.
But she also has anxiety disorder, so when he doesn't reply to her messages, she immediately blames herself, and starts to 'doom spiral'. When it gets really bad, she will go silent.
When people like her stop talking, it is a REALLY bad sign.