Your boyfriend loves how you look... it's you who doesn't. He sees these 'attractive' women in porn... but favors you. You see these women in porn and feel bad because you aren't adhering to the standard you are forcing on yourself --- not him.
Your boyfriend is so far removed from this inferiority complex you've developed... it's not even funny. He's not going anywhere... he's not thinking about how inadequate you are physically... all he's thinking is 'wow, this porn has made me horny... where's my beautiful girlfriend?' That's it...
Porn is just something that helps achieve an erection for him... he doesn't think about such things as 'gee... I could do so much better than my girlfriend... I want a woman like that in my life.. etc.' Seriously... his brain probably doesn't go beyond 'wow, she's naked!' or 'he's really giving it to her!'
Bottom line... this is a YOU problem... and doesn't involve him. He's happy with you... you're not happy with yourself. And you need to stop being dissatisfied with your body... I mean it's your boyfriend who will be appreciating your beauty... and he's apparently quite happy with you.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen