Worried about new bf

I’ve been dating this guy for a month. He’s SOOOO SWEET to me. Treats me like a princess however... idk. Today i got my period and told him and he seems disappointed bc i don’t wanna go to the city with it and he knows i’ll prob not want sex either.... idk. i just don’t wanna feel like it’s all about sex. Maybe i’m just overthinking but like i feel like other girls would be easier and more open, i feel like i keep disappointing him. And it’s always along this topic. He’s never complained or anything, i’m probably just overthinking. but ugh:( what do y’all think?