that’s a really tough question, but i think the question goes even deeper. what if the type of guy you’re looking for is different from what your mother wants for you?
do you have someone (a teacher or something) that can talk to in order to help you figure out who you really are and what truly want. then have a respectful heart-to-heart talk with your mother, and explain (if it’s true) that the type of guy you’re looking for, would davka be looking for someone who’s skirts are longer and maybe would be turned off if skirt didn’t totally cover when getting into a car, etc. it’s not about halacha, but about who you are, and you want that how you dress to be a true representation of who you are so can find your particular bashert soon.
hope this helps. good luck!