A little sentiment is good for the soul, as long as it's expressed naturally and with sincerity.

As you write lines of verse for your beloved, keep in mind that the root of poetry means creation.

poesy
Pronunciation:
\ˈpō-ə-zē, -sē\
Function:
noun
Inflected Form(s):
plural po·e·sies
Etymology:
Middle English poesie, from Middle French, from Latin poesis, from Greek poiēsis, literally, creation, from poiein
Date:
14th century
1 a: a poem or body of poems b: poetry c: artificial or sentimentalized poetic writing2: poetic inspiration

poetry
writing that formulates a concentrated imaginative awareness of experience in language chosen and arranged to create a specific emotional response through meaning, sound, and rhythm