Background - Been with Dp for 10 years, we have a 3 year old son and have our wedding booked for May 2020 (been planning for a while), normally very stable couple with no major issues.
Current situation- My employers and my Dp employer scheduled their work Christmas party nights for the same night. Dp would goes out quite frequently were as I do not. He stated that he definitely did not want to go to his Christmas party and so I went to mine. I felt that at the last minute he was regretting this decision but I was on my way out to my own at this point. He mentioned along the lines of you could leave yours early and I could nip out to mine for a bit'. He messaged me during the night but around 11pm he started being rude and said he was going to sleep.
The next morning he woke me up in quite an aggressive manner shouting at me to get up and look after ds as he was going out. He then ignored me all day, later that day he shouted at me to get myself sorted and up instead of lying their in a heap (hungover). Now 2 days later we still haven't spoke.
I'm really confused as to why he has reacted in this manner to something so trivial but when questioned denies this is the reason and states in a sarcastic tone 'I'm not speaking to you because I've nothing to say'
He slept on the sofa last night.
He is 35 years of age fgs