Help me with my sex life!! 😭

I’m so embarrassed to even post this but I need help. Me and my Husband have only been married for about a year and a half. When we have sex we just do it and we’re done. And as in do it, I mean we only do like 2 positions. He wants to please me and do more, but i’m like scared? Embarrassed. I don’t want him touching me down there or anything. Well I do, but I don’t let him? I know I sound crazy. I feel like him pleasing me is wrong or something. I don’t know why I’m like this. I’m not sure what I’m exactly asking for her, I just need help.