Orgasm Advice Please

Gen • Complete and utter nerd with a big heart and a love for all things artistic.
My boyfriend and I have been known each other for over four years and are very much in love and have been having sex for almost two years now and he's good in bed but, he has never made me orgasm, not even once though I'm pretty sure he thinks he has. Any advice, positions that might help, products? Is this normal? Any help would be appreciated lovelies