If you can't think what to write in your Valentine's cards

Here are some Elvis lyrics*:

Wise men say
Only fools rush in
But I can't help falling in love with you

Your kisses lift me higher
Like the sweet song of a choir
You light my morning sky
With burning love

Well, please, don't ask me what's upon my mind
I'm a little mixed up, but I feel fine
When I'm near the girl that I love best
My heart beats, so it scares me to death

It's now or never
Come hold me tight
Kiss me my darling
Be mine tonight

If these don't work for your love situation there are more at this link. 

*Note: Elvis lyrics from Can't Help Falling in Love, Burning Love, All Shook Up, Now or Never