1. I feel you must either be busy, or you don't want to talk to me! (Be careful of confusing "feel/felt" and "fall/felt" - they're so very different!) 2. While I was writing this letter, my mother was cooking dinner and making tea. (What was the "!" for? Also, capital letter for "I". Always.) 3. When I asked her why, she explained it to me. (Say [something] / tell [somebody] [something] / ask [somebody] [a question]. Also explain [something] [to somebody]. "Explain me" has a different meaning: you become the topic!)

1) Are you busy, or do you just not want to talk to me? 2) While I was writing this letter, my mother was cooking dinner and making tea. 3) When I asked 'why', she explained to me.

1) I think you are busy or would you not like to talk to me! 2) While I was writing this letter, my mother was cooking dinner and making tea! 3) When I questioned her why? she started explaining me!