Family Standards

My mom recently found out I was dating this guy and made me break up with him but she accepted my sister's boyfriend when she was my age. Lemme tell you the differences between our boyfriends. My boyfriend is 1 grade leverl younger than me, is not the same ethnicity I am, and as she says- doesn't come from a "stable
household" (his parents are divorced and he isn't amongst the wealthiest). My sister's boyfriend is the same age as her, is the same ethnicity, and is pretty well off So obviously you guys no why my mom is more accepting of hers. It really does break  my heart to know my mom isn't as accepting towards my choices, I lover her but I'm deeply hurt by this. Idk how to feel anymore