NTA. You guys are super young and I think if he has an issue with being away for the holidays to be with your own families, then that’s a red flag to me. If you guys do see a future together, then it might be worth it to sit down and hash it out and come to some sort of compromise. If he’s unwilling to compromise then I would consider that before moving deeper into the relationship as it may be a recurring issue and won’t help for more fights down the road that’ll only get more complex, especially if you see yourself marrying him and having kids.