Am I the only one

Just wondering if anyone else is like me or knows why I am like this? My boyfriend always wants sex but I don't, he is literally wanting it as soon as I am with him and if I don't have he will try all night, I feel like we can't just talk for half an hour. He touches my legs, belly and other places to try turn me on but i really don't want him to touch me sometimes. Some nights we don't have sex and I feel bad because it's my fault😕. Is it normal not to want to have sex with your boyfriend?