I was on the other side once. My now ex bf waited for a month to break up with me because I had my finals and at the beginning I felt betrayed. I just couldn’t understand how he could fake it so well and wondered what else he could have faked... and for me it was easier to just hate him for a while. It would have been hard to feel kind of grateful for breaking up with me... but after some time passed I realized that it was really mindful. But I was 18 at this time... your SO might understand it way sooner.