trouble during sex..

so my boyfriend and i have known each other for a year and a half, but have been together almost 5 months. we have been sexually active since about 2 months because we were comfortable.

i can have an orgasm whenever i’m masturbating by myself, but i can’t whenever we have sex. there’s positions that feel good but i don’t get anywhere with them.

he always says he feels bad because he wants to make me feel good, and he does, just not making me orgasm. can anybody give me any tips??