My mom is 50 and...

Shes been proposed to 5 times in her life and she declined them. Well now that shes getting older she keep saying things like no one cares about me no one is going to take care of me when I get old. And when she says that it really pissses me tf off cause she knows damn well I'm going to take care of her but i really need her to get her own car (we've been sharing my car for almost 2 yrs now) I cant go out and do what I need to do cause she always has my car. All I can do is work and come home. I have alot of things I would like to start working on but her not having a car is holding me back on so much its stressful. I'm trying to get in a position where I'm able to take care of her when shes old. But my mom wines so much she has me thinking at times if I should even have kids. I feel like I shouldn't have kids and just help her out and take care of her. She talks like no one cares about her. It really just stress me out. I wish she had a man that could help her and satisfied her. But any little thing a man does that she doesn't like she cuts him off. So yeah shes pretty much is going to be single forever. I just need advice...I feel like my mom has me in a hole