How do you say " I dont love you anymore "

I believe that actions speaks louder than words, the cold treatment that he recieves from you is more than enough for him to realized that you dont love him anymore...but if ever he confronted you, you had no choice but to say it straight on his face..." Im sorry, I have loved you with all my heart a long time ago but it would be unfair on your part if i will not be true to you and to myself that i have woke up one morning and realized that the feeling is gone, i dont love you anymore, just let go and set me free...

Do you have to say it loud and clear before the person knows that you are not interested? But if he/she really want it said, then go ahead and say " wish you could please keep a distance so i can breath!!!"