Luckily this is a manga and if her only two negative points is that she's needy and wastes money, that can be manageable if she's willing to compromise but we can never expect others to change as fundamentally it usually is a part of their makeup. She's the type of girl if you met in real life you hang out with and nothing more, if something is showing threats and danger to your safety whether it's time, physical, mental, or financial take cautionary measures.