The same as my last comment, some punctuation or at least separate into lines to guide the reader

for instance, this is how I would read it and I also made some changes according to how I understood it. But feel free to ignore them if it's not what you meant.

When the sun shines
one shall feel love in the air
because for every heart
the sun will set somewhere

there's an empty space in one's heart
yet it cries out to be love
for whose love will touch one's lives.
that cry for love somewhere in the night
it's for open arms to embrace one's heart.