I (17M) and my mom (40M) have had a rocky relationship for the past 4 months because of her relationship with my dad. My dad has never liked me or bonded with me due to him thinking I am an affair baby even though i’m not.

My dad has belittled and controlled me my entire life, and while my mom doesn’t agree with it, doesn’t do anything to prevent it. To give you an idea my family purposefully had their Christmas celebration while I wasn’t home, i’m guessing so it wasn’t obvious that they didn’t get me anything.

Meanwhile they had gotten my brother (15M) and sister (7F) hundreds of dollars worth of gifts. Honestly i’m used to this sort of treatment but when I told some friends they said it wasn’t right. Since I started dating my (18F) girlfriend 5 months ago my dad has upped the antics.

Telling me my girlfriend will cheat on me soon, preventing me from seeing her, basically trying to use her as another thing he can control me with. After a bad fight a week ago, my dad personally threatened my girlfriend and he then took my phone, car, and kicked me out of the house. During the fight he threatened to call the police on me, threatened to fight me, and was chasing me around the house. I ran down the road and my mom and sister got in a car and we spent the night at a hotel.

The next day though my mom went back because I guess she didn’t have anywhere else to stay. Since then I have been staying with my girlfriend and her family who have been extremely kind and supportive. My mom told me she was going to leave my dad and buy a house within the next couple weeks. This has been a common conversation for years of her saying she’ll leave my dad and never does so I don’t know how much weight it holds.

Now to recently. Yesterday my mom told me she booked our family a week long cruise. All of us together, including my dad. After some back and forth with my mom of me saying I didn’t want to spend a week with my dad, let alone on a cruise ship she told me if I didn’t go I owed her $2000, the cost of my ticket. I told my mom I never wanted to speak to her again and that even if she buys a house I won’t be moving back in with her

. I don’t even know where they are planning on going or when it is. But on the other hand maybe it could be fun? I have a bad relationship with my dad and brother and from the looks of it me and my mom are heading down that path. But I do have a great relationship with my little sister. I know i’m young so maybe i’m just not seeing the bigger picture. Am I the jerk for not wanting to pay $2000 for a cruise I didn’t even want to go on in the first place?

Edit: I have a job and can afford the $2000 but it would be almost all of my savings for those wondering. I see a lot of people telling me to do a DNA test and confused why there hasn’t been one done already. I am sure I am his kid. I hate to say it but I look exactly like him. I don’t know if a DNA test or paternity test has been done already when I was younger. Even if I were to get one done and throw the results in his face I doubt it would change anything. He would probably deny it. I really think the only reason he has accused it is to further isolate me from my family. I also don’t have the means to buy one right now. I am trying to save everything I can to buy my own car. In the future when I am more stable I may try and do one just for peace of mind. I know this may not make sense to most of you, but my dad is extremely stubborn.