boyfriend gets more than me sexually?

i feel like my boyfriend is the one to be pleasured the most, i spend a lot of time giving him blowjobs or handjobs and even other things like scratching his back or playing with his hair. but he doesnt do things for me as often. he has had orgasms almost every time we do sexual stuff and i have only had 4 or 5 total. TOTAL. and we have been together for a year and a half. it feels so good when he does go down on me but he doesnt do it often and when he does he stops after a minute or two and doesnt try to finish. idk if i should say something to him or just keep going the way we have been going, i just dont wanna start an argument.