Need a bit of help 'cause my Spanish is rusty

There's a lovely song on Luis Miguel's Christmas album Navidades that I enjoy very much, but while my long-unused Spanish is good enough to catch the general drift, I'm stuck at a couple of places. Any help would be very much appreciated.

Here's the Spanish:

No, ya no pienses en llorar
De qué vale lamentar
Lo pasado pasó
Si ese amor terminó
Otro amor puede llegar
Nunca es tarde para amar
Y volver a ser feliz
Sonríe

No, para que la soledad
Cuando la felicidad
Puede hacerte sentir
Como es lindo vivir
Nunca dejes de soñar
Y mañana al despertar
Ve la vida con amor
Sonríe, Sonríe

No, nunca dejes de soñar
Y mañana al despertar
Ve la vida con amor
Sonríe, Sonríe

And my very bad translation follows -- corrections would be deeply appreciated.

No, don’t think of crying
What good does regret do?
What’s past is past
If this love has died
Another love can arise
It’s never too late to love
And to turn to happiness
Smile

No; so that solitude,
In your time of happiness
Can teach you to feel
How sweet life is,
Never stop dreaming
And tomorrow when you wake up
You see a life with love
Smile, Smile

No, never stop dreaming
And tomorrow when you wake up
You see a life with love
Smile, Smile