no one can "make" you feel inadaquate- this is something that gets churned around in your head until you feel a certian way. if you are confident in yourself and how you look, then it doesn't matter what anyone says- it's not going to affect you. however, if you have doubts about your appearance, it's easy to take a very small comment and twist it around in your head until it's a big ugly monster staring you in the face every time you look in the mirror.
my first question would be, as previously stated, in what context was this " had mentioned that my body was not what he was attracted to" said? was this during a discussion about what you find attractive? or was this during the heat of an argument? also, WHAT DID HE SAY EXACTLY? i've found that what guys actually say and the meanings us women interepret are usually two different things. sit down with him, and tell him that this has been buggin you. say "hey, at one time you said something that i interpreted as you saying you didn't find my non-petite body attractive, and it's been bugging me ever since." if you've been together for a year, you should feel comfortable enough with each other to talk about things like this. if he really loves you, he's gonna be concerned how what he says and does affects you.
also, when you say he's a "sexaholic" what do you mean? does he just like sex a lot and masturbate every day, or is he really and truly obsessed with sex in all forms? if he's anything like my SO, i'd bet he's closer to the first than the second. young guys are really really really horny A LOT and in order for them to mentally function properly they do like to masturbate and have sex in order to let off steam. and let's face it, porn is full of skinny women with HUGE fake boobs. that's the way it is. porn chicks are small, mostly, so don't be so quick to assume that just because he's looking at it that's what he wants definitely. talk to him about his attitude towards porn- chances are, he gets aroused by it but isn't actually wishing he was WITH those girls. (i mean WITH in the same sense you're with him- mentally and physically). girls think that when guys look at porn they want the girls in the porn over thieir own girlfriends/wives but often that isn't the case. when you look at porn, are you getting aroused at what's going on, or are you going "gee, if i was with that porn star it'd be so much better, he's so hot, blah blah blah"?
i'd focus on what makes YOU feel sexy. if you feel that your body isn't what you'd like it to be, change it! you SHOULD NOT feel like you have to conform to a model of beauty that is unrealistic for you. Like, it'd probably be impossible for you to be 5'11" and a size 0. make yourself feel sexy! get some cute clothes, throw out everything that you don't look fabulous in, eat healthy, exercise (not only shapes up your body but is GREAT for making you feel good about yourself), masturbate! babe, you have 34DDD BREASTS! i mean, my god, if your BF doesn't want em bring em my way! you've got some boobs, and some curves, and that's what most men really want, least all the ones that are worth a damn. the stupid standard of beauty that has come about because of people like Pam Anderson and all those Maxim models is unrealistic anyway. don't try and be someone else- be yourself!
i know exactly how you feel tho- i'm 5'11" 220lbs 36D and definintely DON'T look like Jenna Jameson. but even tho my SO looks at porn, i know that it's me he wants at the end of the day. you have to realize, that your man is WITH YOU, not some skinny aneroxic bitch, and that YOU are more than the size of your jeans! sit down, talk with him, figure out where your insecurities lie, and deal with them in a mature manner! you are beautiful just the way you are!