More than a feeling?

Common sense tells us that falling in love with our best friend can both be beautiful and painful... I thought that I'd have no more feelings for her, that we were just brothers and sisters, best friends, but it seems the feeling's came back, it never went away, and it's threatening to destroy everything that we've done, all those memories, moments we've created. Before this past few weeks, I've been comfortable with the idea that we'd just be no more than brothers and sisters, but lately the feeling which I've tried so hard to suppress and get rid of last year has all came back, and with it all the whirlwind emotions that follows...

I can say hand on heart, she's the person I love the most all these years, I really care for her, and I really love her, and that I'd never want our friendship to end, if it did it would hurt me to no end, I'd be that devastated, because I know it'll be my own fault, all she can do is just react.. I know because of my indecisive feelings, I've annoyed her so much, yet she could bear with it and still be with me, but me being stupid, continued to hurt her again and again, and I feel so bad, and I just hate myself for it...

All I want is a chance to talk to her, heart-to-heart, but what if it'll end up ending our friendship? She means so much to me, more than a sis, I'd hate to lose her, and my heart really loves her so much, she's the closest thing I have to a real sis, and yes, we do have our ups and downs, but I pray that we would continue on...