Do you think it's wrong that I wish my significant other would hit me.
It doesn't sound healthy. Would there be a reason for them to hit you?
Yes, my significant other is still young and she doesn't know what to do with her life. I used to ask her to think about her future since she has no friends. She often says she wants to die but is afraid of death. I feel like maybe I'm too hard on her.
While it is fine to want to have a fetish like being hit, you shouldn't want your significant other to do things that they aren't comfortable doing to you as that is wrong. Additionally, you need to get mental help for your significant other if she often says that she wants to die. That is a sign of serious depression and she needs help and support to overcome those suicidal feelings.
Well we're not really  like other kids.
It's doesn't matter who you are. Wishing for violence in your relationship isn't right. It might be time to find a therapist who can help with this.