I'm 18 now and I have been in foster care since i was five; I am a middle child with two sisters(one 2 years younger and one 2 years older). My father ditched us when I was three-ish and I've only ever saw him once after. My mother has bipolar (mood swings) and did stuff like throw doll houses at me and my sisters, verbal abuse, and threaten to murder me. She still loves me like any Mother would love her child though. 

 All I remember about being brought into care was living one of my mom's friends for a few days then being brought to another house (my foster house) and living there. When I was brought in I was told that it would just be for a few days then I was going back to my mum's. I really wanted to go back to live with my mom. After a few weeks they started telling me "it is a possibility that you will go live with your mum" or some variation of that. It took me three years to figure out that I was never going back.

 My foster parents were the nicest anyone has ever been to me up till that point and I was the worst possible to them. I thought it was their fault that I wasn't with my mom and hated them for it. Almost daily I would throw long fits of crying/rage where I would become violent towards others. I was five at the time and the fits eventually stopped when I was around ten (I could have been eight, my memory sucks). 

As I grew into my teens I started becoming more and more normal-ish. In high school I would be described as the overconfident class clown. My grades were usually above average and I found school easy. My sisters weren't so lucky. They were both diagnosed with bipolar when they were 13-ish respectively. They both became increasingly rude/violent and they both sucked at school. 

Three-ish years ago my younger sister was put into a mental hospital and has lived at one facility or another since. Again, I was told it would be temporary. My older sister was eventually kicked out by our foster parents, lost her job, and became an alcoholic (long story). I still talk to her a bit but I don't think she likes me. I got into a civil engineering program at a college and will start in September.

I've been messed up for a few months now over feeling alone (although I'm very good at hiding it). I never get to see my sisters. My Foster Parents threatened to kick me out a few months ago (over something small) and they already gave up on my older sister. For a few years now i've always dreaded seeing my mother (used to see her once a month) but continued seeing her because I didn't want her to feel sad. She's done a few things recently that made me cut her out of my life. I'm going to move out in September and be alone.