Without access to the original Japanese, but based on context, I'm going to guess the mistake here is that one of those lines is supposed to say "But I'm pretty sure that I'd be better off if you decided to go back home", while the other line remains "But I'm pretty sure you'd be better off if you decided to go back home".
Seems like it's a pretty common mistake by fan translators and AI translations to mix up the you's and I's that gets implied in Japanese.
Can't edit my previous comment, so I'll add here. Came across the Japanese version, and it's both a translation error and probably a copy/paste error by the typesetter. (Appreciative of the work from the scanlator, but actually a lot of the dialogue throughout the 1-2 chapters I looked at seems to have lost some of its original meaning/intent/nuance in the translation. Unfortunate for a manga that relies heavily on subtext, but I guess that means people should go buy and read the official translations if they're available to them.)
The bubbles on the page (P.13) should be:
Yuzuha (1): Earlier, you know, you said if you two "looked like family"
Yuzuha (2): To be honest, i can also see that you are connected with an even deeper bond, from my point of view
Yuzuha (3): That's why th... hmm... it's a bit difficult, but...
Yuzuha (4): From my point of view, it'd be a happy circumstance for me if you hurry up and went back. Probably.
Next page:
Sayu: You're saying it outright, huh
Yuzuha: Hehe... sorry. But, you know, it's not just for this reason why I'm saying it'd be better for you to go back.
Sayu: I know
Yuzuha (1): Don't hate me Sayu-chan (ahhh)
Yuzuha (2): so earnest, so hardworking, such a cute smile
Next:
Yuzuha (1): Probably, the things I've been saying to you, you know,
Yuzuha (2): Ultimately, I don't think I'm saying it for your sake
Yuzuha (3): But...
Yuzuha (4): Because I've also already fallen for you, you know
Yuzuha (5): That's why, do your best... I want you to be better than you are now
Yuzuha (6): I want you to live your best life now... is what I think
Next:
Sayu: ...Yes 'm
Yuzuha: (1): It'll be ok!
Yuzuha: (2): bc the Sayu-chan now has lifelong friends
etc etc