a lot of sex ??

My boyfriend and I have had a lot of sex for the 9 months we've been together.. but sometimes when he wants it I'm always down, but when I want it he doesn't?? Yesterday he wanted it and I told no because he wouldn't give me it when I wanted it so why should I give him it? He was totally okay with it, btw our life surely does not surround by sex we do a lot of other things together.. this is usually right before I leave his house or at the end of the night.. but I want to like drive him wild while we have sex, want  to make his orgasms like he's never had them before? Is there anything I can do? And I want him to want me randomly .. like any teasing??? Help please!