Considering this is a cute romcom we're never going to get a harem ending. We'll probably get a shitty "best friends forever" vague ending that leaves everyone unsatisfied: the girls, they boy, and the readers. The only other option I can see out of this is adding a 3rd romantic interest that will win. Which at this stage is probably too late.
This is why I hate love triangles in my romcoms. Spoils everything.
When i started reading this is seems like there was one FMC and her overprotective friend, which is common enough trope. But then it just gets turned into yet another stupid love triangle that leads to nothing but suffering. Good work author.