I genuinely cannot deal with the thought of another girl, one he has slept with before, living with and spending all her time with him.

He says it was a last minute decision out of necessity, one which neither of them are thrilled about. 

I do not know how to deal with this. I am a mess and I feel so beyond uncomfortable with this. Is this something I can get past? I don’t know what to do. I like him so much and I feel like this is destroying it. I keep thinking about who she is and how pretty I’m sure she is and that he will be living with her 24/7.