The ILY doesn't necessarily have to lead to a breakup of the three-way relationship. It depends on how you played it. Yes, my MC told Josy in Episode 11 that he loves her. But already in Episode 8, the MC indicated to Maya by adding a heart emoji to a message that he also loves her, and Maya responded in kind.
The decisive factor for a breakup will be the protagonist's response to Maya in episode 10, when she asks him if their relationships are similar to Melanie's with her friends or if theirs are different.