Is this my fault?

Diana
I have been with my partner for over a year now and I recently lost my virginity to him. We have sex once or twice a week ( He usually visits me Saturday and Sunday afternoon because he lives an hour away from me and he works every day of the week, not weekends) Anyway, he has been upset because I am not able to have an orgasm through penetrative vaginal sex. I can only orgasm orally. This upsets him because he says he is not enough for me in bed. Is this my fault? What am I doing wrong? How can I orgasm differently? What can I do to be better in bed? Ladies, help me.