Let bygones be bygones and live the rest of your life happily. How to explain it?

How do you explain that you have forgotten the past and are happy for the rest of your life?

This sentence means to write off the past, whether it is good or bad, let it go, because the past has passed, and it is impossible to go back to the past. So the past is written off, so you don't have to think about him or recall the past, just let it go, so the past is written off.

The rest of my life, I am happy, that is to say, the rest of my life is happy. You said yours, I said mine, and we'll live by ourselves. I think this sentence is usually a sentence after a couple separates, that is, two people are going to separate, that is to say, let bygones be bygones and let bygones be bygones in the future. Well, let bygones be bygones, and then we can start a new life ourselves. I think that's what it means.

Just buy it and go there. Don't mention the rest of your life. You can do whatever you want, and I can do whatever I want. You don't have to worry about each other.