@kiero13 Why? He clearly cares about her a lot. Why should she give up just because the person she likes doesn't see her as a romantic interest just yet? If that's enough for her to give up and go after someone else...I don't think any of her relationships would last, if she could ever even .
Unlike the first couple, where there's a massive age gap and one doesn't remember the other, here she actually has a chance. If you're thinking both people will start liking each other from the very beginning...well, that doesn't usually happen in mangas or real life. No matter who else she chooses, she's gonna have to put in the effort to get them to like her first anyway.