I'm 15 and I want a doll?

Hi I'm 15 and I want a doll I think I have hit rock bottom when my parents got a devours he cheat on her a lot of times. Idk why but I think this doll I want btw monster high doll. Is trying to take me back when I was a kid and everything was alright. I mean I want it and I will pay for it! I just want to now why I want it so I need to know is some thing wrong with me? . ?