Hi charlie517 & welcome to the chordie forum!
I agree with jets60 - there is a song in you.
If this is your first song then keep it simple - there is no need for flashy fretwork or complexities. Keep it short and sweet and sincere. Three chords will probably be sufficient.
For the lyric, think about what makes her special and what she loves to do. Maybe think about some stuff that you have done together. Think about what she is proud of in herself.
Jot down words, phrases, images whatever comes to mind.
Don't get all hung up on sounding like anybody but yourself.
Don't get all hung up on having it all make perfect sense - love never makes perfect sense.
A series of images or phrases strung together might be the perfect message.
Sometimes, the less sense a song makes the more artsy and poetic it may seem.
Pick a simple song that you like & model your chord changes on that.
Song writing is tricky to get started at - but then it becomes impossible to stop because it is so much fun.
Here is link to 'the progressionator' which is a gizmo that helps choose chords - it might help ticke your muse:
http://www.hotfrets.com/songanator.asp
James
"That darn Pythagorean Comma thing keeps messing me up!"
[url]http://en.wikipedia.org/wiki/Pythagorean_comma[/url]