Unfortunately, if the story keeps following the web novel, she will not be recovered.
The manga seems to be following it for now, with only slight alterations or stuff that was introduced way later added sooner.
After MC identity reveal she tries to pass as her girlfriend but MC had already cut her off, well, she did herself when he was put in the lower class, he simply snapped the last threads.
Power gone to her head so she couldn't bear to be close to MC, when she realized he didn't lie she tried to twist things but MC simply made clear it wasn't true and they weren't a couple or even close anymore.
She gone crazy, as she realized to have done the equivalent or ripping every winning lottery ticket in the country and didn't accept it, continuing to say that, I think MC gone with lawyers to make her stop, but she was still deranged, seeing everyone as someone trying to get between their love.
She got expelled and started working as a dungeon idol to make money, thinking of having become a real idol, escorting normal people in a dungeon in a flashy fanservice suit, the activity got put down for the risk to her paying fans.
Her parents were hostile towards MC, I mean it as they wanted the two together, and lying that they had promised to get together or that MC had ruined their daughter.
My memory is foggy but something happens and she kills or harms a cop, that gets her in jail/juvenile, but the facility is not made to contain adventurers and she escapes, she returns home and for some reasonends up killing her parents and then goes into hiding.
She finds a unknown dungeon in a island and enters it, thinking of levelling up until no one can stop her or her love, she gets killed in it by monsters.
I can tell you more if you want as it doesn't end there.
I too was sad at this development, thought MC would have a GF with a authentic NPC face when she was introduced, or a close friend, sadly she gets every hope snuffed out with force.
