You might be a man (or woman) of few words - but it seems that less is more when it comes to relationships.
Of course it is important to say "I love you" but eye contact and body language are important too. Otherwise that phrase can become a cliche.
As I write this, a scene from the film 'Oliver' has just popped into my head. Nancy asks Bill Sykes if he loves her and Bill (Oliver Reed) snarls back "Of course I love ya - I live with you don't I?" If you know the film - and the way in which he treats her - you'll agree that words can mean very little.
But there is a phrase that has much more impact than the famous three little words. A simple "Thank you" can do more for a relationship than any hollow cliche. Showing your partner that you appreciate them and what they do for you and with you is very important. And actions speak louder than words - so accompanying them with the occasional thoughtful gesture gives much greater impact. Breakfast in bed for example...
Be careful how you announce a gesture though. If you have both contributed to a mountain of dirty pots then wash them but keep quiet. Don't (please) say "I've washed up for you!" as if it was the job of the other person and you've been generous.
Finally you could always shrink the vocabulary down even further as Patrick Swayze famously did in the film 'Ghost'. The single word 'Ditto' was his signature romantic overture.
But if you do propose to your loved one this Valentine's day then do let us know. Just reflect your words in your eyes and you won't need a poetic script. Lots of love to you all.