my wife is always busy with her work, and we don't have much time spend together

Most women still pay attention to their family rather than work. I think she is just working hard for her family. Please try to be considerate and never complain about her. When she goes home with a tiring boby, please try to give her a massage. Praise her and comfort her. Women like to be cared. When you do so, she will get close. My husband and I usually have a talk at night. It's about everything. As the communication is a very important bridge for a couple. You can have a talk with your wife when you are lying in the bed. At that time it's quiet and it's the most suitable time to have a talk.