Do you think I`m too childish?

I`m 13 and I sleep with a blanket every night, and I can sleep without it. When I`m home alone, or home with just my family, I carry it around the house. I love it because it used to be my dad`s. I have a dad right now, but he is my mom`s second husband, and my adoptive father. When I was five months old, my dad died in a car crash, leaving my mom alone with a new born. When I was three, my mom got remarried. Around that time, I started to sleep with it. It`s been about ten years now.