What do you think about me not going to see my mom for my birthday?
Why don't you want to see her for your birthday?
I know that she is going to ask from me something that is very expensive and I think it's not worth my money
It can be frustrating to be asked for money or things when it is your birthday, so it is okay to not want to spend time with them. Spend time with people who really care about you instead to have a great birthday.
I know about that. Can you stop telling me what I have to do? I can do whatever I want.
Whoever you spend time with on your birthday is your choice. It's best to do what will make you feel happy.