Here are some sentences that are both sad and beautiful in English:

1、The memories we shared were like autumn leaves, once beautiful, now left to drift alone in the wind.

2、Love can be both sweet and bitter. Just like a sharp blade cutting both the flesh and the heart.

3、The tears in my eyes are like raindrops in the night, silently falling, leaving only sadness behind.

4、Sometimes, the hardest thing to do is to let go of someone you still love, even if they've hurt you deeply.

5、In the end, it's not the years that bring us pain, but the memories of those years that still leave us feeling lost.

6、The more I try to forget, the more clearly your memories come to me, like a dark shadow that never leaves my mind.

7、Our love was like a flower that couldn't bloom in winter, withered in the cold wind, leaving only sadness and regret.

8、I wish I could forget you, but your name is forever etched in my heart, a reminder of lost love and unfulfilled dreams.

9、I feel like a lost soul wandering in a dark forest, with no direction and no hope of finding a way out.

10、The pain of losing you is like a knife cutting through my heart, leaving me bleeding and alone.

11、I remember the good times we had, but now they are just memories that bring me more pain than joy.

12、Sometimes, the only thing left to do is to let go and let the past become a part of your life that you can't change.

13、My heart feels empty without you, even though it's filled with memories that I can't seem to let go of.

Each of these sentences expresses a different kind of sadness and heartbreak, from the loss of love to the pain of memories that won't fade.