talk about my problems with him?

My boyfriend used to call me everyday and wed talk for hours and hes be teh sweetest guy ever. thats all normal for the first few monthjs and I know it dies down as time goes by. WE have been together 6 months. I am inlove with him more than I have ever been with anyone but I feel like somethings wrong now. I dont feel included in his life at all really, I never know what hes up to or anything. I get like one or two phone calls a week and a few text messages. When I do see him…like twice a month…its great its like we were when we first started dating passionate fun and I want to to be like that more often. We do have different friends because hes older adn lives in a different city and we have different lives but it never affected us much before. I need for him to put more effort into us or I dont think I can be with him anymore I feel like im just there and nothing more. I want to talk to him about this all and I am seeing him on tuesday. I have no idea how or when to bring this up but I know I have to do it in person. I dont want to leave him unless I really have to. I jsut want advice on how to go about talking to him. I dont think its good that I miss 2 months ago so much or that I just sit here wondering what going on.