<human>: My girlfriend and I go to school in the same city. I go to the university, she to the college. I lived in residence and made some very close-knit friends. She also lived in residence but did not have a very good experience.

I am moving into a house next year with 7 of my residence friends. There are 4 male and 3 female. 

My girlfriend strongly does not want me to live with girls. This is understandable, and we had a very long, calm talk about how she felt about it, where I reassured her many times that she has nothing to worry about, and she said she believes me, and that she will try to come to terms with it. Let me note that she did not bring up these feelings until after I had signed the lease.

several months later now, she has started to bring up the house almost weekly, and causing fights that are very stressful. I cannot back out of the lease, and there is a factor out of my control, which she knows about, that prevents her from living with us.

Several of the other people in the house have S/O's who are also not living with us, and they all seem fine with it. These relationships vary from 6mos to 3yrs. 

I would like some advice on ways to make her feel more comfortable/less jealous/less insecure about the whole situation. Any advice welcome

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Living with several male and female roommates. Girlfriend is very unhappy, causing many fights, and I do not know how to make the situation easier on her.