Is my man not into me anymore?

My boyfriend and i have been together for almost 5 years now but we consider ourselves married anyways for alittle more than 2 weeks now we havent even snuggled. So a week and a half ago I asked him if he wanted to (you know what) but he said no. I asked him 2 times after that and I gave him oppertunties to even cuddlle with me but all im getting is a cold blanket. I know hes faithful but do you think that hes trying to figure out some way to tell me something? I mean come on we have 2 kids together. I dont know what else to do. Can someone please give me any advice that i can say to him? Please I'd appericate it. And Thanks.