This is how texting works: you text me, and depending on what I'm doing, I may see it instantly or I may see it three hours from now. When I do happen to read your message, if I deem it one of those messages which necessitates some kind of response, I will reply when I have a convenient moment. It's how it works for everyone. Stop sending me texts asking if I'm busy! If I were busy, I wouldn't be able to answer you anyway!