It's always bittersweet to see the ending of a manga favorite... but a conclusion is better than never-ending for plot-based stories. Even in rom-coms, seeing 0 progression and only hijinx when you want to see the two lead characters get together is exhausting. All good things must come to an end.
Hoping the author does at least a couple of like, slice-of--life epilogue chapters.
On an additional note, I find it enjoyable that this series concludes with there being a heaven (god's world), where even after death, they can all be together. So even the idea that "they'll be separated by death" isn't even true. Incredibly heartwarming thought for me.