Orgasms and Sex

Brinley
Okay so this is a little embarrassing to admit. Me and my boyfriend have sex at least once a week and he can get off everytime(orgasm) but I have not had an orgasm once. The only time I have orgasmed is by masterbating. We have been having sex for almost a year. We've tried every position and we've done oral. I don't know if this piece of information is necessary but he is 7 inches so I think that's big enough. Can anyone please give me some advice or something?