What do you think?

Today me and my SO had sex as usual. But the thing i havent done with him in a long time was gave him a good kiss ( by good kiss i mean make out) i just dont care much for it and as time goes by, i feel like the little kisses are even better then making out. And he always wants to make out and i just simply dont. All though today i felt like going for it and wanted to give him what he wants and was hoping for round two for sex and then he rejects me. He didnt want to makeout with me. And told me to stop and just fell asleep. Could it be that he doesnt feel the spark anymore between us and just didnt feel anything with the kiss? Was i the problem for not ever wanting to makeout with him?