Try some of Elizabeth Barrett Browning. She has quite a few well known love poems, the following being one of the better known. Hers may be almost too personal, more from one lover to another, but give them a look-see. Maybe you will find something you like.
HOW DO I LOVE THEE
~ By Elizabeth Barrett Browning ~
How do I love thee? Let me count the ways.
I love thee to the depth and breadth and height
My soul can reach, when feeling out of sight
For the ends of Being and ideal Grace.
I love thee to the level of every day's
Most quiet need, by sun and candlelight.
I love thee freely, as men strive for Right;
I love thee purely, as they turn from Praise.
I love with a passion put to use
In my old griefs, and with my childhood's faith.
I love thee with a love I seemed to lose
With my lost saints, -- I love thee with the breath,
Smiles, tears, of all my life! -- and, if God choose,
I shall but love thee better after death.