It's five o'clock in the morning
And I haven't slept at all
Or: And I haven't slept a wink
Thinking about your beauty
I'm going to end up crazy
Insomnia is my punishment
Your love will be my relief
I've gotten to know your boyfriend pretty well
Small and not good-looking
And I know that he doesn't love you
Besides, you don't love him
Because he doesn't measure up
'Dar la talla' = to be up to par, to measure up, to make the cut
He doesn't know how to please you