over protective parents

Ok im 20 years old im in college and i been with my bf for a year and we been talking about me moving in with him and i would like that and be together and getting married but my mom she doesnt want to until im out of college .. and i mean i can still be in college and living with my bf but my mom diesnt understand that she thinks it would not work like that... btw im mexican and my parents are mexican and yall know what goes on lol there over protective with me and i just want to tell my mom that im 20 and she cant tell me what to do ... i think?