Hi LadyDi,
There is one thing that I want to say though about this situation. Since he is so busy all the time, if by chance you two were ever to live together sometime down the road, are you prepared to have him away from home as much as he is? Are you prepared to have him come home and crash every night?
This sounds like something that is not going to change anytime in the near future. If it is his lifestyle, expecting him to change it probably isn't going to make the relationship work any better.
I'm not trying to put a damper on your relationship, I'm just trying to get you to think about this and not just go by "emotions"