I took an overdose as well, when I was 14. It all just got too much carrying it around, didn't it?
How else has it affected me... how long have you got? 
I've struggled with depression all my life. I've tried to kill myself quite a few times since. I think it started very early... even as a young child I remember feeling everything was grey and bleak and frightening. Instead of being allowed a carefree childhood, I carried around my mother's biases and the weight of her problems on my shoulders, and viewed everything through her depressing tainted lens. I thought things for children were silly and pointless because I had much bigger, more grown-up things on my mind, so struggled with friendships at school.
It gave me this feeling of isolation and of being different from everybody else. I didn't fit in and didn't feel like I could relate to other people. Not because I'm autistic or anything like that (I wondered for a while), but because my childhood experiences were just so different from anyone else's that I knew. I felt like there was something terribly wrong with me but there was no one I could confide in. I remember wanting to tell someone about the sorts of things my mum would say to me but holding back because it would be a betrayal of her confidence. My default in life is, "I have to go this alone", and struggle along.
I also grew up with a really warped view of sex because of having to listen to details of my mum's sex life, or just sex in general. I remember her flipping through a porn magazine from the 1970s with me when I was about 9. It made me feel dirty and ashamed, so in adulthood I struggled with this sense of sex being dirty and shameful.
I've felt throughout my life that I'm responsible for other people's feelings. So I've ended up in several abusive relationships because I kept feeling sorry for them, they can't help it, they don't mean it etc, and after all, what am I here for if not to soothe other people?
I've had a lot of therapy, which has really helped. Plus I didn't see my mum for nearly 20 years. Thankfully I've always had a very silly sense of humour and a sense of childlike wonder about certain things which I try to indulge in as much as possible, because I'll be damned if I'm getting out of here without some kind of childhood!
It's so revelatory to talk about this to people who understand. How else do you feel it's affected you?