I went through this same thing with an ex of mine. She was in the upper class where as I'm blue collar. I had this preconceived notion about "rich" people or wealthy people. But the more time I spent around her family I realized we were all the same. She was In college for a master's degree and I was working in a skilled trade. I felt inferior in education and accomplishments. Albeit it is quite weird to be in a completely different social class and try to explain to people what you're doing with your life and what your plans are (was 23 at the time) was quite weird when the lot sitting around you graduated from ivy league schools and owned their own businesses. I'll always appreciate the time I spent with her family and her. I felt inferior around them but realized there was absolutely no barrier between us. They had more money and means but treated everyone equally and had great morals. It pushed me to figure out why I wasn't doing what I wanted to achieve. after the relationship ended I realized I viewed everything in a whole different way. Money, people, status, achievements etc etc. You can have hundreds of thousands in cash but still deal with the same things other social classes deal with. The only luxury I saw was the money and means to get things done.

TL;DR I realized the only difference in social class is the amount of money you have