Did he freak out over Thanksgiving or something else?

My guy asked me on saturday if i'd like to come to his parents for thanksgiving dinner and i said yes, and mentioned going to my house first then his and we made that our plan. Now backstory, he hates my mom for immature reasons so he doesnt come to my house much. He also is extremely afraid of commitment and titles, in fact we dont have one tho we've been together over a year now. saturday he went to the bar alone to think and have him time it was after this him time he asked me about thanksgiving. Then tuesday he goes out all day/night with the new girl at work i know he thought was hot from school a year ago and doesnt call me at all, tells me the next day sorry he didnt get in touch but at least said he was with her and her friend upfront when i asked who he was with. i thought maybe its friendly, but then last night he says hes going out with his best friend and didnt say where for sure until i said i was going to the same place, then he called saying he didnt want to stay, wanted to go home, etc. i went anyway with a friend and ak him when i get there if hes still there, he says no im going home. i was already in so i walked around and turns out he wasnt gone, but he was there with the new girl. came with her. i stayed calm asking to talk, he blew up saying he knew her awhile and what was the deal. never heard from him last night after i left and havent heard a word today. Did the thought of spending the holiday with our families freak him out? and he felt the need to push me away like he feels is easier to do when things get serious? or is it simply hes interested in this girl and was doing what he wanted last night, mainly being out with her and not me