confused

My boyfriend and I have a wonderful physical relationship when we're together. But during the school year we are long distance. At first, we masturbated together over Skype or FaceTime but eventually that started giving me no pleasure whatsoever. It would take me nearly 45 minutes to orgasm! So I started watching porn behind his back. The only kind that really turns me on is lesbian porn and with that, I could orgasm within two minutes. I didn't tell him for almost a year but when I did he was really hurt but understanding. He kindly asked me not to do porn anymore because it makes him feel like he's not good enough. But nothing makes me orgasm. Is there something wrong with me? I'm attracted to my boyfriend. Just not long distance.