I meet a guy on a online dating site. He got my number and text me but he goes days with out talking to me. If I ask him a question he answers but sometimes a day later. He has talked about how busy he is at work and because he does make an effort to answer my text and if I don't text him he will text me after a few days. But is it really because he's busy? Should I keep texting him to keep the convo going? What kind of things should I ask or talk about to keep it interesting and flirt with out feeling like I am bothering him?