Is it wrong to feel unloved after this?

My mother told me the other day that I don't need as much attention or emotional support than my sisters because i have a smaller build and I'm both skinnier and prettier than them. She barely pays any attention to me and dotes on my sister, buying them clothes and helping them with everything. My older sister even has a boyfriend, and the only time she is nice to me since they've been together is when she's telling me how love she feels and that I should look for a guy. It's really annoying because I really would like a boyfriend, and she's a depressing reminder that i'm still single and unloved by a guy. I don't know what to do with this, I'm so confused.