1. I could not provide an accurate poetry translation without more context. To translate poetry well requires an understanding of the cultural, historical and literary context surrounding the work. My apologies, but here is a word-for-word translation to the best of my ability:
I attained not from him except a wink of his eye

2. And messages of his acceptance or anger
And I answered on the back of the letter when he came

3. So he would cross out my writing in the letter with his writing
If only the greenness of his brightness and excuse