My dad died about 2 years now and I really miss him, and my mom just got a boyfriend and I'm guessing she's really in love with him, because I sometimes say bad things about him and she knows it's true but she always defends him and says he's a good person and all, and every time I say something bad about her boyfriend she hits me, and all I want to do is be with my dad but I can't so I'd rather leave my house and never return so that she'll realized everything she did to me.

Are you male or female? What's bad about him? She actually hits you?

So, stop saying bad things about him. Try to get a long with him.
As noted, what is wrong with him, and to be blunt, unless it is something in regard to your care, it is none of your business. Your mom is lonely and is ready to date and find a new man in her life. No man will be perfect, so finding one that is good is hard at times. You need to try and be happy for her,

You sound jealous and hurt, and I doubt you know anything about her NEW boyfriend.

You have 2 options: learn to stay away from him and to stop complaining about him to your mother, or turn your mother in to Social Services by telling the school nurse that she hits you, and get placed in foster care. Foster care is often much worse than home. Some are loving, but many are just doing it for the small allowance they get from the state to feed you. You get no love, and you get no phone or internet or allowance or anything.

I do feel for kids who lose a parent and get a new one who isn't nearly as nice and loving. Keep a journal of your memories of you dad, and collect pictures for a scrap book.
AVOID her boyfriend and STOP complaining about him. She has a right to be happy, and for all you know, she needs someone to share finances with. I'm a woman who has lived on my own for many years, and I have to pay all expenses myself. So next time you get something that isn't basic food, house, heat, and a pair of shoes when your old ones fall apart, thank them both for being together. If she were alone, you might not be on the internet asking about all this.

Your mom is happy. This man will not replace your dad. Just because you don't like him it does not make him a bad person. Stop talking about him to your mother, unless he is physically hurting you, leave it alone. If you change your attitude you may find him to be a nice guy.

I am so sorry you lost your father. I know that must be hard for you. It's terrible to lose a parent at such a young age. Was he sick? Was it an accident?

One thing you have to remember is that your mother deserves to be happy, just as you do. You aren't the only one who lost someone they love, your mother did too.

While your mother should not hit you, you shouldn't be talking bad about her boyfriend unless he abuses or molests you. He will never replace your father, but you need to give him a chance.

If you give him a chance, you might find that you like him and that he likes you. What is so wrong with him?