Should I prioritize my boyfriend or my parents?

I'm a 21-year-old female, and my boyfriend, who is also 21, and I have had an on-again, off-again relationship for the past two and a half years. We recently got back together about two months ago, and things are going really well. However, when we last broke up a year ago, he insulted both me and my parents, and his behavior during our relationship was abusive and manipulative. I confided in my parents about this, which understandably made them dislike him. I regret sharing those details, especially now that we're back together, so I've decided to keep our relationship a secret. The issue is that he wants me to spend New Year's Eve with him and his family, which is a five-hour drive from my parents' house. It's December 29th, and he wants me to be there by the 31st at the latest. I’m struggling with how to explain to my parents why I need to leave, especially since they’re thrilled to have me around—since I work in another county and don’t see them often. If I tell them I'm back with the same guy who disrespected us and hurt me, it would not only hurt them but also undermine their efforts to help me heal. If I concoct a story about having a party at work, they would likely be upset that I’m leaving them right after they’ve been so happy to have me home. On the other hand, if I stay with my parents, my boyfriend will be disappointed. I care deeply about all three of them, and I'm really torn about what to do. I could suggest that my boyfriend come to my parents' place, apologize, and celebrate the holiday with us, but I’m uncertain how my parents would react to that. I'd really appreciate any advice on how to handle this situation.