Some background.
I have a sister who is a few years younger than me but has always been the 'grown up' one. I have only ever had one boyfriend which ended badly and another experience I had in my childhood means I find any sort of intimacy hard so I have never had another relationship. My sister though has had a constant stream of boyfriends since she hit puberty. On Christmas day five different men came round proclaiming their undying love for her. I don't smoke or go clubbing and only drink very occasionally. My sister smokes every day, gets stoned in the afternoon and goes out partying every night. I only have one friend, who I talk to on MSN every few days and on the phone maybe once a week and we go to the pub a couple of times a year. My sister has the aforementioned army of male admirers, literally hundreds of girl mates and they are all round here or ringing her up at all hours (and I mean all hours - she has people coming and going at 3 or 4 in the morning). I feel like a maid answering the door to her friends, answering the phone, cooking her meals, washing the dishes, trying to keep the house clean etc. She'll come in at 1am with three friends and expect me to whip up a meal for everyone. But all this I can cope with; I know that the two of us are opposites.
I went to knock her door the other day to ask whether she was going to be around for tea and I accidentally overheard her talking to one of her friends about me. They were saying that I have no common sense at all and I'm never going to get anywhere in life, and her friend said "yeah it's much better to be thick and normal than a bloody smart arse".
I study an academic subject so immerse myself in abstraction 90% of the time, but I think I have common sense. I look after myself and the house, I save my money and drive safely. I might not have the best fashion sense or a hundred friends but I have all my faculties.
When I was alone with my mum I casually mentioned that I feel small and naive and a bit stupid around my sister and her friends, and Mum said I shouldn't be angry with her or anything, because she's normal and she's living a normal life.
Am I a blubbering idiot who's never going to be anything but the class nerd?