Neither I nor my boyfriend have finished..

We have had sex once and he had told me "he just wasn't into it" and we talked after that and we mess around sometimes and he's fingered me and I've given him a blowjob but neither of us has came... He didn't cum when I gave him a blowjob and I've just never had an orgasm so I'm used to it but it kinda sucks.... Any advice? How can I make him cum?