Is OTHER wrong in the post ? POST : Disclaimer: I'm on mobile, so there might be some formating errors.

Disclaimer n°2: bit of a long story, tl;dr at the end

So a little bit of backstory here: My (16) parents divorced when I was 7, and I've been alternating houses beetween the two each week since. I've never had any issues with it so far, mostly because I can't remember what it was like before, so here's that. 


Now forward a couple years, my father met a woman 5~6 years ago and she's been living with us since. At first she was nice with me and all, no problem whatsoever. 2 years ago, they got married and all, and that's when shit began to hit the fan: at the ceremony, all my father's friends began to trashtalk my mom behind her back (although they were her friends too), and everybody had a good laugh, except me of course. At first it was just during the ceremony, but now, every now and then, my father's friends or my mother in law start to badmouth my mom or her family (my mom's family tree's a bit complicated and they often make fun of it), and when I try to tell them that the fact that they do it in front of me irritates me, they shrug it of or say it was "just a joke" and tell me to relax.


 And that was only the beginning... 


Now, my mother in law is starting to take over my father's household: when my father and I want to do something together (ie playing games together, doing sports or watching a TV show), she tells us that we can't, because it's eirher "stupid" or that she just blatantly doesn't want us to do it, for no apparent reasons. She also comment my dressing style, saying it's ugly or unfashionable (I don't have the pretention of being a fashion specialist, but i'm dressing like your average teenage guy). We live in a decent sized appartment, though I have a rather small room, and my mother in law litterally invade my room by putting her stuff in my closet, putting MY stuff away. I tried asking nicely, but everytime I was talking to a brick wall. Even worse, when we talk with my father about something, she just drop in to say things like "what would you know of that, you're only a kid" and always belittles me as if I was five. Also, when my father and I are disagreeing on something, she will always, always side with my father, doesn't matter the time or subject, even if i'm right, i'll always be wrong because "he's your father and you're only a child". It's always things like that, little things now and then that bothers me in the end. And since there's some fight you can't win when you don't pay the bills, I've always kept a low profile.
More recently, I've got myself a girlfriend since about two month, and I shared the news with my father, who was happy about it, but my mother in law kept saying "I'm impressed that a loser like you could get a girlfriend, she must be blind", and at that point I kinda lost it. I said that she has no right to say this to me and that I didn't ask her opinion, and she replied whit something that angered me over the top : "stop being insolent to me! You know, when I chose to be with your father, I chose because I love him, not you. I'm making an effort by accepting you!". At this point I was just in shock and went to my room to think about it.


Now, as when I'm typing this, it's m'y birthday in two days and i'll be 17, which mean I can appeal the divorce judge's decision and decide to live only with my mom, who's got a nice flat and is much nicer to me. 


The only thing holding me back from doing it is my father's reaction to this, I feel I'm kinda betraying him by doing this, cause the only things he did was to marry a bitch and being blind to the struggle I'm living even when I explained it to him. I'm affraid he'd fall into depression, because when my mother and him divorced, he took it very badly and almost like a betrayal, and I fear he'll hit rock bottom if I go live with my mother full time.


Tl;Dr: my stepmom's a bitch who's regulating m'y life to make it what feels like a living hell, but if I go to my mom's, it'll probably destroy my father who's only guilty to have bad taste in women and be oblivious to my struggle.


So, Will I Be the Asshole if I move out my father's house?

