If your boyfriend's parents hate you...

My boyfriend's parents absolutely despise me. Well, his dad has made it clear he hates me. His mother seems to be okay with /me/, but she absolutely hates my family. My mother antagonizes her, my dad seems like a deadbeat to her, and my siblings act like uneducated brats around her (one's 8 and one's 12 and they both do their best to be as loud as possible). Recently his parents have banned him from coming to my house because of my family members; I fear soon they'll start banning any interaction.
The root of their hatred does not come from only my family, however-- a few weeks ago, his dad walked in on us doing sexual things and hasn't said a word about it /yet/. His father refuses to participate in anything involving me and comes up with excuses for me not to come over. His mom is the only parent willing to participate in the relationship at all because my folks are completely uninterested. Since neither of us drive (we're in high school) we depend on her. I'm so worried she's going to start disliking me. What do I do? Should I change how I act and suck up to them, at least for now? Or confront them about it?

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