Feeling very sad... :(

My fiance is changed, he still loves me, he loves me more than used to, but I feel really bad, that we have sex just whenever he wants to and if we have sex he goes to sleep straight away, I feel like he's using me, he doesn't care that I want something as well, I want attention, but he's always too tired, don't remember when the last time he touched me, it's not all about the sex, but it makes me really sad that he thinks only about himself :'(