I loved you so much yet i could never say it. How am i suppose to say im in love with you ,when your in love with someone else?

I loved you so much, that it destroyed me. I cried and ached  and I put on a smile and help you with your troubles, knowing that my biggest one was you. Since i love you so much i will give up what wasn't mine and see you happy. I'll love you and love you always but your happiness comes at the cost of mine.