<human>: Can you condense the text into three sentences or less?

Hi everyone!

Im currently living together with my girlfriend. we've been together for almost 3 years. started living together a year and a half ago. after living with some roommates for 6 months we moved out and are renting a house together. Our lease ends in 7 months. Quite honestly, I dont think I can last that long. 
First off, shes a wonderful gal. Shes very thoughtful and really sweet. But she is also kind of a slob. she doesnt clean at all around the house. Im always staying up extra late to clean up after her mess. She is also very spoiled and throws tantrums when she doesnt get what she wants. At first I thought they were cute but after a few months, it became unbearable. She has become really needy and always wants to be the center of my attention. a few months ago her brother moves in and honestly, hes been such a burden but I just dont want to say anything. I clean up after him all the time and he doesnt seem to care.  He has.... a minor mental condition but it isnt that serious. Hes normal 99% of the time but sometimes gets these paranoid episodes. But because of that I cant tell him to clean up after himself or act his age (hes 18 and currently in college but my girlfriend is always doing all his schoolwork for him.)
There are so many other things but im not here to rant. I just need a little advice.
Anyways... We signed a 1 year lease for our house, but I cant take it anymore. I want to leave but obviously, I have a lease. I also have nowhere to go so im kind of at a loss. After we moved in together I lost contact with all my friends and I feel like theres no one to turn to. Any help would be appreciated. Thanks guys.

P.S. If you guys want more details, ill be happy to supply them.
<bot>: Want to leave my relationship but i signed a lease with her. Lease ends in a couple of months but I cant take it anymore. I have nowhere to go and I feel no one can help.