Should I change for my boyfriend's parents?

My boyfriend and I have been going out for a year, but now suddenly he’s told me that his parents want me to change my attitude and watch my words whenever I’m at his house (he lives w/his parents). The thing is, they’ve been speaking to him about this for sometime (I don’t know for how long though), but now he’s finally told me. Obviously there’s some communication problems there. But the thing is, I’ve never been rude to his parents, though I don’t always greet them whenever I come to his house, b/c sometimes they’re not home or they’re in their bedroom (they like to keep my boyfriend and his brother out of their room, weird I know). They’ve made me dinner sometimes, I’ve gone out to eat w/his family, sometimes we all watch movies together at home, etc. But I’ve never been rude, I hardly swear near them, I always stay out of their way (such as if they need to speak w/my boyfriend about something private, whatever). I just don’t like it that they want me to change for their sake and not my own, I know that if I change just for them, I won’t be happy. I’m not sure if my boyfriend agrees w/their demands, he said he doesn’t want to have to choose sides, and I don’t want him to. But I know if I change my ways, they’ll eventually want me to change other things to, such as how I dress, etc. I guess now I won’t be coming over to his house so much anymore and I’ll have to be careful about how much time I spend there, which is sad. Of course my mom wasn’t too happy to hear this, and now this has probably tainted whatever ideas my mom had about his parents (they’ve met twice). How will I be able to continue this relationship w/my boyfriend w/out feeling welcome whenver I’m at his home now? And there’s another part to this story, he’s been continually pressuring me for sex. I’m not ready for sex, and since he’s always inquring about it now, it’s kinda made me afraid to even do it b/c I know that once we will, he will want even more. I even do blow-jobs for him b/c I know it’ll keep him content for a little while. Since I won’t do it with him, he’s always looking up porn on my computer whenever he’s at my apartment (he’s never had sex before and so I understand that, but I wish he was a little more considerate of my feelings). But this isn’t healthy and it’s annoying me. He wants me to be more sexually, basically change for him. Both him and his parents want me to change for them (of course in different ways). Is this relationship worth trying to save? Is it even going anywhere now? I don’t want to have to consider breaking up b/c his parents want me to change. I wish he’d just get a grip on his hormones. There’s a few other issues that are part of all this, but that’s the gist of it. I really don’t know where to go from here. Any words of advice would be much appreciated!!