If she's with someone for 7 years, she loves them. Period. NO VALENTINE'S DAY SURPRISE! If you want to get to know her, BE HER FRIEND. That's IT! And if you pull some shit on V-Day, she most likely won't even want to be your friend. Be her friend, if there's ANY chance of her liking you, and one day leaving her man for you, it won't be by someone who doesn't respect the fact that she's in a relationship. Be her friend.
May the wind always be at your back and the sun upon your face. And may the winds of destiny carry you aloft to dance with the stars