AM IN A DELIMA

I am a 23year old female. My parents died when i was 8 then I dropped out of school because no one could afford to pay my fees. I then met this guy when i was 14 and he sent me back to school. He was selling fruit then but still he was Able to pay my fees. He then got a job as a truck driver and sent me to university. my problem is that i feel i can't continue with this relationship because he is not my type, he isn't fluent in English, he his a very short man Plus some other Personal stuffs. I feel I have Paid him back for his Good Deeds cos I give him sex anytime and anywhere he wants. But now he can't meet up to my demands. How best can i tell him that he is not my type without hurting his feelings?? I am grateful that he sent me to school but i can't be in a relationship with him anymore. I want somebody in my own class not a truck driver. Please help!