How do i get my mom to realize im almost 16 and should have some freedom?

Hello, ive got a problem. My mom is keeping me inside and not letting me eger do anything. Lets start at the beginning. My mom didn't like my friend because his mom was always late. Then later on she said he was a bad influence and lied alot. The thing is i know that he does lie. But not as much as he used to. So now i cant hang out with him and another friendship ruined by my mom. So after that. I got a laptop an ipod touch a tv and a desktop tv that i all payed with my own money. Now she is limiting when i can use them. For my laptop she wouldn't let me use it whenever i wanted first of all. Then she wouldn't let me use it when the screen is out of her sight. She always had to be there watching me for me to use it. I hated that, later on my warranty was gone and the laptop broke. I got a new desktop computer. I wanted to use out of her sight, she wouldn't let me. Then i got a tv and ipod. Originally i was able to keep my ipod in my room, but things changed then she started calling it a portable computer and said i couldn't use it in my room on the weekdays. My tv couldn't be in my room either. Her reason for the tv was that i would be watching tv all day. That was when antenna tv signal still worked. So i decided to put the tv back in my room and got an ipod to tv cable and i plqyed music and games with the tv. Now she says i cant have the tv in my room even after there is no cable in my room or tv channels thru antenna. And also shes saying i cant use my ipod in my room at all now. now im completely broke and out of ideas. Me and my mom are always fighting. What should i do now? If you answer please have sense and dont leave 1 word answers that pisses me off