Spoiler
She was supposed too....crying increased her 'empathy abilities' and therefore she can save her fated partner and erased his scars.
She is his destined and he is hers. Imagine God is controlling your heart strings and your love is suffering in front of your eyes. Even without this ability, she will still cry in agony and pain seeing this boy she is destined to love suffering.
Check out spoilers on novelupdates. It is legit.
I believe she is so favored by god because she is such a delicate compassionate and fragile soul
No worries I just copy my reply from above for you to check out the spoilers to see why she always cry. You are actually one of the comments who sympathize but want to see her strong. But unfortunately she was supposed to cry because it is kind of her ability qs explained in a spouler i read. She empathise and that might be the reason she was so loved by god because she is just so delicate

Okay the plot are idea everything is absolutely superb but elzay just dont cry for once ok,,, I know its dire but put up a brave face...?