To be honest, until Rihito develops more romantic feelings towards her, Noa is gonna be stuck like this forever. Remember that Noa got to this point because she rushed her relationships to the point where she practically only had one-night stands exclusively (due to how emotionally tiring she can be). Rihito is the only guy who seems willing to put up with her so she is EXTRA hesistent to be the one to change their relationship just in case of rejection/ it turns out that he pumps and then dumps her.
Noa is still a virgin though...
Thats one of the main reasons guys dumped her in the past. She's got a really hot body so they put up with her antics to get some but when she refused they left.
Most if not all of her past relationships were with shitty men aiming for her money and body. Rihito is literally the only male in a similar position to her exes that genuinely just wants to hangout and play together for fun. He wont pump and dump and she knows he isnt the type to do that.
What she is afraid of She literally shouts every other chapter lol. Shes scared of pushing him away. She is self aware enough to know she is a pain in the ass but cant stop, therefore she is trying to change herself for him. If she starts aiming for a relationship she believes he will get tired of her and leavr like all the other men.
Its like she thinks changing the relationship title to dating is what will trigger it to fall apart