boyfriend???

when ever me and my boyfriend do stuff he always wants me to blow him and give him hand jobs, so i do. i don't mind but it's starting to upset me that he never gives me anything in return. hell finger me for like 10 seconds then stop and not do it again. the only kind of pleasure i get from him is sex but yet again it never makes me orgasm. why is he being like this? and how do i bring it up to him?