how do i tell my boyfriend that he’s never made me finish?

hi! i never post on reddit so please bare with me. my boyfriend and i have been together for almost a year now and it has been absolutely amazing. he is the best boyfriend in the world and i am truly so lucky that i am with him. but im reaching a dilemma. whenever we have sex he doesn’t make me finish. it’s not like he is doing this on purpose because i lie and fake it for his sake. it’s not that the sex isn’t good because it is, i just for some reason don’t finish with him. (for context he is also my first and only sexual partner i’ve ever been with.) i don’t want to hurt his feelings and it doesn’t matter that much to me because seeing him satisfied/happy makes me happy. but i do want to experience it once and im scared to tell him because then he will think he is doing a bad job. any advice on how to bring it up? should i bring it up to him or just deal with it?