I feel your pain. I think 109natsu has a point when s/he says to get a new teacher if the one your have isn't working for you.
First of all, thank you so much to you all. I'm thinking about it over and over again. I love music and I already accepted I won't be a concert pianist (that was just a naivne dream, whatever I love music and that's why I started taking piano lessons... ). Maybe I need little break from the lessons (I'm at last year of my school and literally morning till evening there, I'm going to apply for an art university and I need focus on my own work right now... And all those exams are exhaustive.)I discussed this all with my mum. She told me she understands me how I feel and if I want we can give my teacher some extra money if I would feel better.. But she thinks my teacher has some financial support already. Who knows. I know If I tell her I don't want to take lessons anymore I'm going to make her sad, so we decided to tell her that we just can't afford lessons anymore. I'll try to find her a new students through advertising on culture websites etc. and find her some charity if she really needs it. I'm sure she isn't bad person, maybe she just doesn't see how heartbreaking is to hear all this. I think it is because she lost her baby girl long time ago and clings on me. Yes, it is sad, but I can't stop enjoying life because someone has problems. And I feel like we pay for hearing those problems (to be fair, sometimes she asked me how my life is going and tried to comfort me when I had bad day. And definitely helped me to learn play piano. But I agree it's kind of manipulative when she tells me some stuff how much she will miss me and how I cant stop taking lessons etc.) And I'm not going to stay with her as a student forever. And I think I "sacrificed" plenty of free time for the lessons (no holidays, not seeing friends and family).I should stop care about others too much and always keep on mind - I'm responsible for my own life -.Well.... I'm definitely going to play on piano, but not taking lessons right know.. And then I'll try a new teacher and I will see how things will go. And I'm not really happy about that, but also I'm not happy taking these lessons neither so I should "end" this relationship between us (but of course help her as a person).