How to convince my Mom I don't miss my sister?

My sister went off to college, and im her younger sister. my mom continually tells me that I miss her, but really I dont. how can I get across to her that I dont miss my sister and I am better off without her around? Shes really starting to get on my nerves about it and shes making my sister some home every other weekend so I dont get “lonely”. im a solitary person anyway, as in I can have just as much fun by myself as with a group of my friends. also, without my sister taking up my taking space in the house, I’ve become more outgoing. theres another problem. fo rsome reason, my mom thinks that I shuld be exactly like my sister. e.x preppy stupid, dumb blond, (no offece) and exteremly popular. I dont care to know everyone in the school, or be a stupid prep.( agian, no offece to all of the preps, most of my friends are preps) shes laways picking out clothes that I dont like, and when she goes out and gets me clothes, their always like a couple sizes too small. ( her reasoning is that I should just lose weight to fit in them, but im not over or underweight and im not about to be one of those skinny girls who think their fat). how do I het them to stop? the last question I have is that my mom and sister think they always know how im feeling and what I awant. its really annoying, how can I get it across to my dumba$* sister and mom that I am not like my sister and that they dont always know how I feel? I’ve tried ot talk to her, but all she does is get really pissed at me yells, grounds me from my cell phone or something, tells me im wrong and sh enever wants to hear about it agian, athen is like Crazy almost like pms angry for the rest of the day. she refuses to listen!