How can I get him to spend more time for me, to make room in his life for me?

My boyfriend never has time to see me anymore. He is always busy with work (he does have a very demanding job and has to travel every week and work late alot) but he could find some time for me as he finds time for everything else. He finds time to babysit for his daughter when she and her husband go out , he finds time to drive his daughter to the airport all the time even though she has a husband and a car of her own, he finds time to go shopping for his new home, he finds time for his hobbies but is always too busy for me. I like to stay overnight with him and I seldom can because I have to work some saturday and sunday mornings but I have a few but last time I couldln't spend the night because he had to get up really early to take his daughter to the airport and didn't have time to bring me back home (I don't have a car). I am on vacation from work this week so I have the weekend free for a change but I know he will be too busy to take me out. He is mid 50's.