A 'sakura i cant be with you fanfic' might also play with the idea of timing. Maybe they meet at the wrong time in their lives. Sakura could be on a different life path, focused on achieving certain goals, and the relationship would be a distraction. Or it could be a story about growing apart over time, where they start close but gradually their lives lead them in different directions, making it impossible to be together.
Well, in 'I Can't Think Straight', there's Tala, a girl all set for an arranged marriage. But then she meets Leyla and things change. Tala starts to question everything she thought she knew. Her feelings for Leyla are strong and she has to deal with a lot. There's her family, who have certain ideas about her future, and there are the cultural traditions that she's been brought up with. It shows how love can make you re - evaluate your life and fight for what you really want.
Love and identity are big themes in it. Tala's new - found love for Leyla makes her question her identity as a woman who was supposed to follow a traditional path. Family and cultural expectations are also themes. Her family has expectations of her in terms of marriage, which are part of their cultural norms. And finally, the theme of breaking free. Tala has to break free from the traditional mold to be with Leyla and be true to herself.
There are several options. Online manga platforms such as KissManga or Manganelo might have it. Or you could check out dedicated manga apps available on your device's app store. Just make sure they are legal and reliable sources.