how do you tell some one you love them

Just tell him straight out.

One of my boyfriends told me they loved me, it was so cute, he sat me down on his couch, and he kissed my hand, and he looked deeply into my eyes. He was quiet for a little while and then he said, "I'm going to go out on a limb here, but I have to tell you I love you, because thats how I feel from the bottom of my heart"

I almost melted right there. It was very special to me. You should just try and find a meaningful way to do it and pick the right time.