Dear someone

So the other day my mom and dad got there marriage license and I was very excited because I waited forever to see my mom happy even I was so happy I cried.But lately I've been feeling like it's all my fault. My birth sister was named Alexandra and when I was born our cords were wrapped around our necks and the thing is I was right by her when she died and I could've saved her so I feel like it's my fault. About 6-7 years later I had a stepsister named Emily and I loved her and it was all my fault that I was a bad kid I mean it really was all I had to do was listen but I didn't so she was taken away from me when my parents separated. And now I have a new sister named Heather and what if I can't save her I mean she's my sister I would do literally everything to save her but I can't I just don't feel like I can. Recently I've been going through a hard time even though I'm so young it's still hard my mom's been having trouble with the baby and Nonie's been driving me crazy my sister same thing CRAZY my dad and my brother live a fine but I don't get to spend time with my dad no more and my brother well I can't really complain about him it's just the rest of them I mean when me and my brother were little we had problems sure but… Now things have changed we've separated.