Is having a story where a dude cheats on his girl with a woman in the same apartment building, the break up, but she lets him back realistic?

[Formerly Black Trash]

No it wouldn't work as a rom com because the key element of a rom-com is women acting like they wish they were and not how they really are.

You're talking about an arthouse film

It's a horror flick

 

[YaThreadFloppedB!]

yes very realistic. women love cheaters