Just wondering out of curiosity, how common it is for a working class guy to date a middle class person (lawyer, teacher, Nurse, Doctor, business manager)

We hear that women so often will only date across their socio-economic class and will only date across and up. Has anyone here had success in long term dating with someone outside their social class?

I myself, am working class, and currently dating a teacher with multiple means of income (property ownership) and while the relationship is going well currently, I can't help but feel there is no longevity in this. Been non-exclusively dating around 7 months now. There is a part of me intimidated by her success ( multiple Batchelors degrees paired with a high IQ)

Anyone in the same boat, or has been previously?