我喜欢你从我知道你喜欢我的那天开始，这句好最准确的翻译。

I have set my affection on you since the day I knew you love
me！不要遇到“爱”就用love 和like，增加点同义对换可以增加句子的内涵

I loved you at the moment when I knew you love me.

I was yours from the day i knew you love me。大概是这么说的吧。