text: You should tell him.  When I was in high school, I had a similar situation.  I was in love with a guy but was dating his best friend.  I knew that it wasn't his friend that I loved but it was him.  I pondered on the issue many nights and decided that I should just be forward with him and tell him what it was that I really wanted.  So, I told him!  And now, almost 10 years later, we are happily married and have two adorable children.  Girl... you have to go after what you want.  Some men just don't get it when you write it in a letter.  But if you look him in the eye and tell him you love him, he will have no choice but to hear it!  Good luck!