Please help, I'm getting tired of her complaining about everything?

[Tara]

I'm getting tired of hearing my "friend" more acquaintance because i cant stand her half the time.. complain on a daily basis about how "stressful" and "busy" her life is, yet...she is 20 years old still in high school and living with her mother with no job and living off the government. Basically, she lives in her own world and thinks about only herself and if something isn't revolved around her she doesn't care. She volunteers 2 times a week at a rabbit rescue by choice because she has an obsession with rabbits. This past weekend they threw a bake sale to raise money. She baked a bunch of stuff and spent 150$ on baking supplies out of her own pocket(surprising because she's selfish and makes everyone pay for her) and now she is complaining she didn't see any "benefits" from the 1500$ they made for the rabbits. She isn't the only one who spent money on supplies, she isn't the only one who baked. She had the choice to bake or not and now she's complaining it took up so much of her time and money and wants to see some of the money they made because of it. It's sickening that she sees it like this and i'm tired of her complaining and being bitchy towards me because of it. Is she being selfish or what?