I need space...

I'm 23 years old. I've lived in a house for almost 18 years where I had to share a room with a little sister. I have also lived in a small apartment with another person where I had my own room but it still didn't feel like it was my own space. That, I would assume, is because my father lived in the same small apartment with me. I also lived in residence halls too. I really do like them, I liked having a roommate but I no longer wish to live with another person.
As I stated before I am 23 years old. I need my own space to do my own things. I want to be alone. The only problem is that my university doesn't offer enough affordable single living options. I'm so sick of this I just want to be free. I want to be happy. I'm so depressed. I'm so sick of seeing people everyday. I just want a break.