Sarah,
You say that you always want the best for me. Now I know that to be nothing but another lie. If you wanted the best for me, you would have never cheated on me. You wanted the best for yourself, and perhaps to assuage your guilt, you wanted me to be spared the pain. It didn't work. I wish you happiness, not because you deserve it, but because I do still care about you and I want you to do well, even if it is not with me. If you could have only told the truth from the beginning, at least we would both be further along in the healing process, and both feeling less guilty, but neither of us can live life with those sorts of regrets any longer.