:/ should i try to be like my sister?

My sister is really pretty and gorgeous. she is thin, funny, popular and can get boys real easily, where as i am the opposite. i'm fat, lame, a loner and i couldn't get A boyfriend to save my life :/ i try to be like her regularly by stealing her clothes and wearing her makeup and talking like he, but the thing is she goes out drinking every night and got bad grades at school. should i let her influence me or not???