Advice how to make sex special/passionate?

starting off with i agree sex is sometimes great and sometimes not so great, me and my bf have had pretty good and passionate sex, we appreciate each other and switch it up sometimes to keep each other satisfied. He started acting like he wasn't wanting to engage in sexual activity with me anymore. (he acted like this for a month) This past weekend he came over and i could tell he was still acting weird. He always asks me to sit on his lap and flirts with me. I had to engage any kissing or anything, and im very upfront about my feeling. I asked him why was he not engaging any contact with me (besides me basically sitting on his lap) and he blew me off again. I let it go and continued to watch tv with him and later on we got more sexual, i could still feel he was not the same. I asked again and he told me we should have less sex because he wants it to be more passionate and special. Basically said it isn't special and he isn't enjoying it. Which shockingly didn't hurt my feelings too bad because i understand why he feels that way. So i tried to make it special and after we finished he just still was acting uninterested and i started to cry because that was just a slap in the face. He continues to tell me he doesn't wanna be bothered ( he says its not me and that after he finished he felt different) I just dont know what to do cause as a bigger girl i worry he wont find me attractive but he swears hes very attracted to me. What should i do?