Give up and talk about English translation again

Don't be sad, don't miss, and don't have any nostalgia.

Never be sad or think about me.

Forget what should be forgotten, give up what should be given up, and let bygones be bygones.

Forget what should be forgotten and give up what should be given up. Let bygones be bygones.

Maybe this is our doomed ending.

Maybe we're destined to end this way.

I won't forget you, and I won't forget my happy time.

I will never forget you, and I will never forget the wonderful time you gave me.

But now you have to promise me that you will take care of yourself in the future and don't worry me.

But now promise me that you will take good care of yourself and never let me worry.

I want to see you smile every day, and I want to make you happy.

I must know that you smile every day. I wish you happiness forever.