Being your slave, what should I do but tend

Being your slave, what should I do but tend
Upon the hours and times of your desire?
I have no precious time at all to spend
Nor services to do, till you require
Nor dare I chide the world-without-end hour
Whilst I, my sovereign, watch the clock for you
Nor think the bitterness of absence sour
When you have bid your servant once adieu;
Nor dare I question with my jealous thought
Where you may be, or your affairs suppose
But, like a sad slave, stay and think of nought
Save, where you are how happy you make those
So true a fool is love that in your will
Though you do any thing, he thinks no ill