The name of the the song is
Wouldn't it be nice if we were older
Then we wouldn't have to wait so long
Wouldn't it be nice to live together
In the kind of world where we belong
You know its gonna make it that much better
When we can say goodnight and stay together
Wouldn't it be nice if we could wake up
In the morning when the day is new
And after having spent the day together
Hold each other close the whole night through
Happy times together we've been spending
I wish that every kiss was never ending
Wouldn't it be nice
Maybe if we think and wish and hope
And pray it might come true
Run, run, run
Baby, then there wouldn't be a single thing we couldn't do
We could be married
We could be, we could be married and happy
And then we'd be happy
Wouldn't it be nice
Goodnight baby
Sleep tight baby
Goodnight baby