It's all about detachment, sometimes you just need to let go something that it's clearly hurting you.
It's a matter of perspective. Like, I see the message it was trying to convey with having them separate, but I still felt discomforted by it. Sure, being apart will help them both, but is that really it? No other choices? That ending gave a sense of complete hopelessness that I just can't understand. It just leaves this awkward bitter taste in my mouth.