Why I'm Depressed

All this started when I was in 5th grade.My grandmother passed and she took care of me when my dad was working.So my dad started bringing this same girl named Sarah over every night.Soon she was living with us and at first we weren't getting along very well.We had to start doing chores me and all my siblings.Which I have 4 sisters and 1 brother.I was only 11 at this time,but I still understood everything.Sarah thought I was 16 or something.Soon at school I had to start talking to the school counselor because I was still grieving alot.Every weekend I would go to my grandpa's house and spend the night.That was when I had the greatest time of my life.I had kept 1 secret my whole life since 4th grade and at this point I was in 6th.I had a crush on this cute guy named Steven he was funny,hot,and we were best friends.At first he used me for a while,but then once we got closer he treated me like a friend.