How to politely dismiss a tutor! Urgent! Urgent!

Teacher, I feel like you are very good when I spend time with you, you are excellent. Maybe it’s because of my own reasons. I feel like I haven’t gained much or made any progress during this period. Maybe I'm not suitable for your method, so I want to cancel this class so that I can have more time to allocate my own time to other subjects. I know you must persuade me to persevere, and I know teacher you must be doing it for my own good. But I hope you, teacher, can respect and support my decision. I think we will get along more happily in the future