I only have my mum and one sister and am not close to either of them. My mum can be very passive-aggressive, sulky and quite nasty if she doesn't get her own way. On the surface we get on fine, but I can never actually be myself around her so try to limit how much I see her. If I actually voiced my opinions about the crap she spouts or the way she behaves sometimes we would fall out after about five minutes in each other's company. So that's her..
My sister is older than me and whilst we get on fine, we are definitely not close. We have literally never had a 'serious' or 'meaningful' conversation about anything. We don't keep in touch much (every few weeks?) and I'm pretty sure if we didn't have young DC who all like to see each other, we wouldn't see each other at all. I can't really put my finger on what it is. I am a very open person with my feelings and emotions - I have friends (and DH) who I talk to about everything and anything, and tell them I love them, give them a hug, talk to about the 'big' things, etc. But I have never been able to be like that with my sister and I don't even know why.
I don't know if my sister is just very different to me, ie quite a 'closed off' person, of if she's just that way with me. I can't put my finger on why, but it's just as if there's always been a barrier up between us keeping everything at a superficial level, if that makes sense.
Anyway, I'm a big girl now so I know I should just move on and appreciate my own family but it makes me sad. Particularly when I know people with sisters who are really close and clearly love & support each other. It also makes me envious and a bit bitter, which I really don't want to be 