This poet is William Shakespeare

Sonnet CXVI

1     Let me not to the marriage of true minds
2     Admit impediments. Love is not love
3     Which alters when it alteration finds,
4     Or bends with the remover to remove.
5     O no! it is an ever-fixed mark
6     That looks on tempests and is never shaken;
7     It is the star to every wand'ring bark,
8     Whose worth's unknown, although his height be taken.
9     Love's not Time's fool, though rosy lips and cheeks
10   Within his bending sickle's compass come;
11   Love alters not with his brief hours and weeks,
12   But bears it out even to the edge of doom.
13   If this be error and upon me prov'd,
14   I never writ, nor no man ever lov'd.