Don't want uni boyfriend to meet my family..

Anon please because I know people here. Coming to the end of my second year at uni now and this term I met my boyfriend. I'm 20 and have never done the whole 'meet the parents' thing before because he is my first relationship. I really want to see him during the summer, and because we live 4 and a half house away from each other it's going to be kind of hard to just meet somewhere and hangout for the day so we'd have to stay at each others houses. It's something we're both willing to commit to, and he's totally fine with me going to his, however I don't feel the same. I have a good relationship with my parents, we get on well and I'm close especially close to my mum. However, life at home is definitely rocky. My little sister is absolutely hell on earch and causes a wave of destruction, my parents relationship isn't a very stable one they've been on and off for the last few years and they don't live together, usually works that my dad will stay for x amount of time until they fall out and he'll go back to the house he owns abroad. My mum works long hours and her turbulent relationship with my sister and dad means she's on edge all the time and will have a breakdown about the tiniest things (she once cried for an hour because she bought the wrong type of bread to go with dinner.) She also has a minor painkiller addiction. When my dad is home, they argue alot over silly things and my dad is an alcoholic and known to dabble in drugs. Although he isn't violent and usually just ends up asleep on the sofa, it's still very obvious to an outsider. Our house isn't the nicest although we live in a really nice area. I know that may sound like a little thing but he comes from money (even though we've talked about it and he really doesn't care about the fact my house is a dump.) My family woud like to meet him, they're really happy I have a boyfriend and they'd make him feel totally welcome, however, all the things I've stated above are really quite obvious when you've spent more than a few hours with them. I think if he was staying here for days or weeks like we had planned it would all begin to show. I'm really worried about it because it's not really something I've ever mentioned to anyone, I want to see him over summer but I can't bare living with them myself at the best of times, so trying to entertain amongst this all would probably be quite hard. I think he's quite offended though that everytime I mention him meeting my parents I brush it off a bit, although he's excited for me to meet his family and friends I don't think I'm ready for him to meet mine, how do I tell him without offending him and divulging all those details? :/

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