my 2 y/o needs friends :( she's so lonely, I hate that she has cousins but they're so ugly to her…

my 2 y/o needs friends :(

she's so lonely, I hate that she has cousins but they're so ugly to her that she stays in the room with me all day. I had "friends" whom had kids as well but they showed their true colors plus my daughter was WAY to active and advance for her son. Am I a bad mom for protecting my daughter and keeping her in the room? I do let her out and play sometimes but her cousin will come at her punching her and takes her stuff away. I also let her out when I cook for her or washing clothes and I let her help me. she does great with my side of the family and my cousins kids but with her dads sister kid she doesn't do great at all.