What should I do? Should I leave him alone for a while?

What should I do? I love this guy I've been dating for almost a year. He has a lot of personal issues which makes it kinda hard to spend time together. I know he loves me but I'm confused at how if he's in love with me how he can go almost a week without seeing me. He has been there for me threw so much and I have helped him deal with many things also. He has children and muscular of his time goes to them he is a good father so I would never try to interfere with that but I want more. Am I being selfish? I don't always go about telling him how I feel in the most mature way I admit and I think my immaturity to deal is beginning to push him away. I know that he wants me in his life but I'm use to men making things all about me and he's different. Am I being selfish with his time? I know I make him happy and he makes me happy I just don't want my insecurities to ruin us. He is 9 yrs older. Why does he love this way or is it that unthinking to hard? He keeps telling me he's just trying to get his life right which I believe but what about me?