Shakespeare's Sonnets: Being your slave, what should I do but tend

Being your slave, what should I do but tendUpon 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 hourWhil'st I (my sov'reign) 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 thoughtWhere you may be, or your affairs suppose,But like a sad slave stay and think of noughtSave 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.