I love you sounds cliche, but I suppose it will work in place of the words I don't know how to say. I love you is over used, there is so much more to me and you.
I love you is so short, to explain such a large impact. I love you doesn't cut it ; not like the pain of being away from you cuts.
I love you is misplaced by circumstance and childish games. I love you is what I tell you every day, I wish I had another way, some other phrase that could tell you more.
I love you couldn't tell you what I feel towards you, but it's what I have for now, dear. I'll try my best to, maybe someday, turn it into "I do."