Why doesn't my dog like me?

This makes me so sad that she likes my mom and dad better because i bathe her i feed her but she sleeps in their bed and refuses to sleep for long in mine. I play with her and every thing and she just DOESN'T like me. I try not punishing her when she does wrong so she will like me, but even if my mom yells at her she still likes her better and i have never had this problem with dogs i'm usually very good with them! I got her for a christmas present and it doesn't even seem like she mine anymore. :(