I have a very big extended family, and it's only been in recent years that I've got to know a few of my cousins much better and realised that some of them are on the same wavelength as me and that has helped.
My relationship with my sister is not brilliant, and a lot of that is because of the way my parents have shaped her personality.
My late teens were awful, and I left home at the first suitable opportunity. I distanced myself from my family. I met my bio-dad when I was 33. I get on well with him, but he lives abroad so I don't see him often. It has taken a long time and lots of soul searching to reach the stage where I can look and see that it is them and not me. There are still flare-ups (mum caused one this year) and it does upset me because I am an emotional person but I now find the 'getting over it' stage is much shorter for me.
My twenties were hard when I was getting a lot of grief from my parents about my lifestyle, and yet I knew my sister had rebelled at Uni but of course made sure they never saw the evidence of this. I wasn't about to be dragged into the mire of trying to point it out to them, they have blinkers where she is concerned.
I was vilified for my appearance (nose pierced, brightly coloured hair) and for smoking cannabis. My sister was doing way more drugs when at Uni but she'd been such a meek thing they wouldn't believe it, she was a hideous drunk - i rested my head on the table in the pub one night because i had a headache and she grabbed my hair and bounced my head off the table, despite wtinesses my parents insisted i must have provoked her 
My mum has actually said 'it's ok for you, you're a strong person. you can cope with life'......yes, I can....and because they made me that way. I suppose in a round about way they did me a favour....