to cry one's heart out

inconsolable

heartbroken

untröstlich

hartzeren

don’t spend time with someone who doesn’t care spending it with you

love is like a butterfly. it goes where it pleases and it pleases where it goes

a sad thing in life is when you meet someone who meets a lot to you ,only to find out in the end that it was never meant to be and you just have to let go

Empty seats, once filled with laughter, now only echo loneliness

Time Heals All Wounds, But Time Also Forgets

I am not afraid to block Kazuma, not afraid to surrender. I'm afraid, but his heart is no longer stubborn

思念一个人的滋味，就象是喝了一杯冰冷的水，然后一滴一滴凝成热泪

There is no rehearsal in the life , once missing , it will be lost forever

眼泪抵不过难过，随着与你有关的回忆蒸发

你走后，从此故乡只有冬夏，在无春秋

这些句子从不同的角度表达了伤心欲绝的情感，既有直接的悲伤描述，也有通过生活细节来隐喻的句子。希望这些句子能帮助你更贴切地表达这种情感。