He hasn’t finished

So my boyfriend and I have become kinda intimate. We haven’t had sex yet but he has helped me orgasim and climax every time we have been together. Every time I try to help him out he just doesn’t finish. I wanna make him feel the way I feel but I can’t. I’m shy and I’ve tried to give him a hand job and a blow job but he doesn’t seem to finish. Although he says it doesn’t bother him, but I wanna help him. I want to show him how much he makes me feel good.

Do you guys have any tips? Please I’m desperate.