I can’t marry a truck driver that train me to university, I need a man of my class

I am 26 year old woman and my parents died when I was 14 years old. I dropped out of school because no one could afford to pay my fees. I meet a guy when I was 16 and he sent me back to schools. He sold fruit on the street so that he could pay my schools fees. He later got job a job as truck driver and send me to university. I’m now working as a lawyer. My problems is that I feel I can’t continued with this relationship because this guy is not the type of man I would like to marry one day. How best can I tell him that he is not my type without hurting his feeling? I want somebody in my own class not a truck driver please help me.