I loved you when she only liked you.
I supported you while she only brought you down.
She convinced me that you would never like a girl like me. I felt embarrassed, at the thought that you'd ever like me.
While you two dated I regretted keeping my feelings a secret, as I saw how much she hurt you.
If I were to tell you how I felt, would you look at me and laugh? Would you be disgusted and stop talking to me?
There are a thousand possibilities, and I'm not sure what will happen, if I were to tell you how much I love you.