Lack of intimacy

My boyfriend and I have been are you in a little more lately then normal for us it's never anything really serious and on top of that is there a lot of us not having sex or in touching in general half the time I feel like I practically throw myself at him she just get turned down because he's tired or it's too late I feel like he makes sex a chore but I don't have the heart to tell him that specially in that way I know it would break him. From when we started dating till now how much sex we have and has drastically changed and I don't know what to DO. PLZ HELP