Sometimes I wonder how you guys think. The world isn't only black and white. There aren't easy answers for everything. She currently NEEDS him cause she cant afford to move out. She even says as such and SHE'S CURRENTLY SAVING UP TO DO SO.
As for the male lead, yes he could be an option to move in with but after being betrayed by someone you completely loved and depended on, would you actually be stupid enough to just move in with the next guy who comes along? It'd be a different situation if she was being abused.
It baffles me when I see these comments time and time again, because what you're suggesting is a luxury that not many people have. Things CAN always get worse. What if she's homeless for a while and what if the male lead isn't a good person. We know he is cause it's a story but you can never be too sure in real life.

why does it take too long for her to leave him? he's fcking cheater! eww~ disgusting~ is she afraid to leave a trash for diamond who's there for her? best revenge is to leave that man and be happy with someone, and make them realize what they lost! that's it! what a dumb author full of unnecessary drama.