Confused

Hi ladies. So recently me and my fiancé haven’t been having sex as much. I’m 21 he’s 41. He might get it up once a week for me. But I realized that the more we don’t have sex, the less I’m feeling attracted to him and myself. I also noticed I can’t get off anymore unless I think about women. This is also very new because I’ve never had feelings like this before. I’m not sure if it’s me adjusting to my long term relationship or I’m just feeling hopeless at this point. But I’ve always considered myself straight so this is a extremely confusing to me 😭 can someone let me know if this is normal? Thank you ladies