Sex is no longer fun.

My boyfriend and I were laying down last night and we haven’t had sex in s few days and he said “sex isn’t fun for me anymore” I told him “we could end things if you want” he said no.. but that kinda hit me.. that usually means either they no longer find you attractive which I think he doesn’t find me attractive anymore.. or they are falling out of love with you.. idk I’m kinda hurt..