@Anonymous20003000 what he has done is really unacceptable - and he is gaslighting you into thinking you are in the wrong.
my DH (partner of 32 years, married 22) has always gone away with his mates every year - golf trip that started with the same 10 men from work 35 years ago, and recently he goes to a grandprix somewhere in the world with his best mate (they both lost two joint best mates 2-3 years ago to cancer and a hit and run and decided they didn;t want to only meet at funerals).
I’ve never had an issue as one of the reasons for the trips is that these guys DON’T get to see each other regularly in between, but their friendships date back 30-45 years. I know their wives, have been to their weddings (and they to ours). I know, as they are in similar jobs and/or have worked together that they have similar values and conduct their marriages on similar lines of mutual respect and prioritising the family. Whilst he doesn’t ask permission to go anymore - he (and all parties to either trip) always check with wife/kids before booking to ensure they are not away for key family events.
A couple of my DH’s friends are joining/taking my teens on ski trip next year having done so this year - I have a fear of high/open spaces and skiing is hell for me. They look after my kids (both on the autism spectrum but, strangely, brilliant snowboarders) and give wives a break. I get treated to a spa day, some of the wives meet up for a night out, all as a thank you for allowing (wrong word, maybe ‘being okay with’?) them having a blokey sport/beer break.
This is normal and respectful. Your DH has fallen in with a group of men who are possibly intentionally undermining your marriage. I, personally, would give him an ultimatum. Cancel or find somewhere else to live when he comes back. Best to waste the money he’s spent on the holiday now than have the expense of a divorce (and chances are, he may get some of the money back anyway, having booked so recently).
I wish you luck, but can only reiterate that his behaviour is NOT normal or acceptable. A loving father, a respectful husband, doesn’t do this. He is neither and you are best off without him if he cannot see this.