My mother won't let me use air conditioner?

Yes I live with my Mother get over it. No I'm not mooching off her, I have my own full time job she doesn't work. She uses money from her boyfriend who lives with us. She says she doesn't want to waste his money and doesn't let me use it in my bedroom only in hers. It's over 100 degrees in my bedroom many times and I'm unable to sleep. I sweat the entire night and haven't been getting any sleep because of this. I had to go to a hotel for the past few weeks on and off because I can't handle it. She's nice and cool in her room and I'm dying in mine. I almost lost my job because of this and I'm barely affording the hotel. I said I'd pay for the Air conditioning and give her the money but she won't let me.

I am two seconds away from wanting to just end my misery because I can't handle it.

And don't tell me to move out it's expensive where I live and I can't afford it. I earn $26k, average apartment is $2500-3000 a month, I couldn't even afford a crappy $1700 apartment